While not generally a great restaurant town, especially the downtown area, I've dined at a number of restaurants in and around the convention center that are ok:

House of Siam - Thai, voted as one of the best in Silicon Valley - 408/295-3397

Emiles - Decent French food, though quite costly - 408/298-1960

Scott's Seafood - A small chain with a location in Newport Beach and San Francisco, fresh seafood, though costly - 408/971-1700

A.P. Stumps - American cuisine, a 4 star rated restaurant. Very good food, very much a San Francisco type wanna be establishment - 408/292-9928

Bella Mia - Good Italian food - 408/280-1993

Eulipia - American cuisine, another decent, creative restaurant - 408/280-6161

Rue de Paris - Good French food - 408/298-0704

Hope this helps!

raffy