                                POWER OF ATTORNEY


         KNOW ALL MEN BY THESE PRESENTS, that William J. Ketelhut whose
signature appears below constitutes and appoints Roger John Lesinski and
Ghazaleh Koefod, and each of them, as his or her lawful attorneys-in-fact and
agents, with full power of substitution and resubstitution, for him or her and
in his or her name, place and stead, in any and all capacities, to sign any Form
3, Forms 4 and Forms 5 and all amendments thereto and to file the same and other
documents in connection therewith, with the Securities and Exchange Commission,
granting unto such attorneys-in-fact and agents, and each of them, full power
and authority to do and perform each and every act and thing requisite and
necessary to be done in connection therewith, as fully to all intents and
purposes as he or she might or could do in person, hereby ratifying and
confirming all that such attorneys-in-fact and agents, or any of them, or their
substitute or substitutes, may lawfully do or cause to be done by virtue hereof.



Date: April 21, 2004                        By: /s/ William J. Ketelhut
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                                                          Signature



