<DOCUMENT>
<TYPE>EX-99.O
<SEQUENCE>11
<FILENAME>dex99o.txt
<DESCRIPTION>POWERS OF ATTORNEY
<TEXT>

<PAGE>

                                                                       Exhibit o


                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints Ernest O. Ellison, Michael E. Cahill, Philip K.
Holl and David M. Butowsky, and each of them, his true and lawful attorneys-in-
fact and agents with full power of substitution and resubstitution, for him and
in his name, place and stead, in any and all capacities, to sign any and all
amendments (including post-effective amendments) to this Registration Statement,
and to file the same, with all exhibits thereto, and other documents in
connection therewith, with the Securities and Exchange Commission, granting unto
said attorneys-in-fact and agents, and each of them, full power and authority to
do and perform each and every act and thing in as he might or could do in
person, hereby ratifying and confirming all that said attorneys-in-fact and
agents or any of them, or their or his substitute or substitutes, may lawfully
do or cause to be done by virtue hereof.



March 30, 2001                         /s/ Ernest O. Ellison
                                       -----------------------------
                                       Ernest O. Ellison
<PAGE>

                                                                       Exhibit o

                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints Ernest O. Ellison, Michael E. Cahill, Philip K.
Holl and David M. Butowsky, and each of them, his true and lawful attorneys-in-
fact and agents with full power of substitution and resubstitution, for him and
in his name, place and stead, in any and all capacities, to sign any and all
amendments (including post-effective amendments) to this Registration Statement,
and to file the same, with all exhibits thereto, and other documents in
connection therewith, with the Securities and Exchange Commission, granting unto
said attorneys-in-fact and agents, and each of them, full power and authority to
do and perform each and every act and thing in as he might or could do in
person, hereby ratifying and confirming all that said attorneys-in-fact and
agents or any of them, or their or his substitute or substitutes, may lawfully
do or cause to be done by virtue hereof.



March 30, 2001                          /s/ Peter C. DiBona
                                        ----------------------------
                                        Peter C. DiBona
<PAGE>

                                                                       Exhibit o

                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints Ernest O. Ellison, Michael E. Cahill, Philip K.
Holl and David M. Butowsky, and each of them, his true and lawful attorneys-in-
fact and agents with full power of substitution and resubstitution, for him and
in his name, place and stead, in any and all capacities, to sign any and all
amendments (including post-effective amendments) to this Registration Statement,
and to file the same, with all exhibits thereto, and other documents in
connection therewith, with the Securities and Exchange Commission, granting unto
said attorneys-in-fact and agents, and each of them, full power and authority to
do and perform each and every act and thing in as he might or could do in
person, hereby ratifying and confirming all that said attorneys-in-fact and
agents or any of them, or their or his substitute or substitutes, may lawfully
do or cause to be done by virtue hereof.



March 30, 2001                             /s/ John C. Argue
                                           -------------------------------
                                           John C. Argue
<PAGE>

                                                                       Exhibit o

                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints Ernest O. Ellison, Michael E. Cahill, Philip K.
Holl and David M. Butowsky, and each of them, his true and lawful attorneys-in-
fact and agents with full power of substitution and resubstitution, for him and
in his name, place and stead, in any and all capacities, to sign any and all
amendments (including post-effective amendments) to this Registration Statement,
and to file the same, with all exhibits thereto, and other documents in
connection therewith, with the Securities and Exchange Commission, granting unto
said attorneys-in-fact and agents, and each of them, full power and authority to
do and perform each and every act and thing in as he might or could do in
person, hereby ratifying and confirming all that said attorneys-in-fact and
agents or any of them, or their or his substitute or substitutes, may lawfully
do or cause to be done by virtue hereof.



March 30, 2001                         /s/ Norman Barker, Jr.
                                       --------------------
                                       Norman Barker, Jr.
<PAGE>

                                                                       Exhibit o


                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints Ernest O. Ellison, Michael E. Cahill, Philip K.
Holl and David M. Butowsky, and each of them, his true and lawful attorneys-in-
fact and agents with full power of substitution and resubstitution, for him and
in his name, place and stead, in any and all capacities, to sign any and all
amendments (including post-effective amendments) to this Registration Statement,
and to file the same, with all exhibits thereto, and other documents in
connection therewith, with the Securities and Exchange Commission, granting unto
said attorneys-in-fact and agents, and each of them, full power and authority to
do and perform each and every act and thing in as he might or could do in
person, hereby ratifying and confirming all that said attorneys-in-fact and
agents or any of them, or their or his substitute or substitutes, may lawfully
do or cause to be done by virtue hereof.



March 30, 2001                            /s/ Richard W. Call
                                          ------------------------
                                          Richard W. Call
<PAGE>

                                                                       Exhibit o


                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints Ernest O. Ellison, Michael E. Cahill, Philip K.
Holl and David M. Butowsky, and each of them, his true and lawful attorneys-in-
fact and agents with full power of substitution and resubstitution, for him and
in his name, place and stead, in any and all capacities, to sign any and all
amendments (including post-effective amendments) to this Registration Statement,
and to file the same, with all exhibits thereto, and other documents in
connection therewith, with the Securities and Exchange Commission, granting unto
said attorneys-in-fact and agents, and each of them, full power and authority to
do and perform each and every act and thing in as he might or could do in
person, hereby ratifying and confirming all that said attorneys-in-fact and
agents or any of them, or their or his substitute or substitutes, may lawfully
do or cause to be done by virtue hereof.



March 30, 2001                         /s/ Coleman W. Morton
                                       ---------------------------
                                       Coleman W. Morton
<PAGE>

                                                                       Exhibit o


                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints Ernest O. Ellison, Michael E. Cahill, Philip K.
Holl and David M. Butowsky, and each of them, his true and lawful attorneys-in-
fact and agents with full power of substitution and resubstitution, for him and
in his name, place and stead, in any and all capacities, to sign any and all
amendments (including post-effective amendments) to this Registration Statement,
and to file the same, with all exhibits thereto, and other documents in
connection therewith, with the Securities and Exchange Commission, granting unto
said attorneys-in-fact and agents, and each of them, full power and authority to
do and perform each and every act and thing in as he might or could do in
person, hereby ratifying and confirming all that said attorneys-in-fact and
agents or any of them, or their or his substitute or substitutes, may lawfully
do or cause to be done by virtue hereof.



March 30, 2001                         /s/ Charles A. Parker
                                       -------------------------
                                       Charles A. Parker
<PAGE>

                                                                       Exhibit o

                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints Ernest O. Ellison, Michael E. Cahill, Philip K.
Holl and David M. Butowsky, and each of them, his true and lawful attorneys-in-
fact and agents with full power of substitution and resubstitution, for him and
in his name, place and stead, in any and all capacities, to sign any and all
amendments (including post-effective amendments) to this Registration Statement,
and to file the same, with all exhibits thereto, and other documents in
connection therewith, with the Securities and Exchange Commission, granting unto
said attorneys-in-fact and agents, and each of them, full power and authority to
do and perform each and every act and thing in as he might or could do in
person, hereby ratifying and confirming all that said attorneys-in-fact and
agents or any of them, or their or his substitute or substitutes, may lawfully
do or cause to be done by virtue hereof.



March 30, 2001                         /s/ Lawrence J. Sheehan
                                       ----------------------------
                                       Lawrence J. Sheehan
<PAGE>

                                                                       Exhibit o

                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears
below constitutes and appoints Ernest O. Ellison, Michael E. Cahill, Philip K.
Holl and David M. Butowsky, and each of them, his true and lawful attorneys-in-
fact and agents with full power of substitution and resubstitution, for him and
in his name, place and stead, in any and all capacities, to sign any and all
amendments (including post-effective amendments) to this Registration Statement,
and to file the same, with all exhibits thereto, and other documents in
connection therewith, with the Securities and Exchange Commission, granting unto
said attorneys-in-fact and agents, and each of them, full power and authority to
do and perform each and every act and thing in as he might or could do in
person, hereby ratifying and confirming all that said attorneys-in-fact and
agents or any of them, or their or his substitute or substitutes, may lawfully
do or cause to be done by virtue hereof.



March 30, 2001                         /s/ Robert G. Sims
                                       ------------------
                                       Robert G. Sims
</TEXT>
</DOCUMENT>
