Chow.com one of the most popular web sites devoted to food and drink, and a lot of their users are seriously devoted to sushi! Their goal is to inject that sensibility into its smorgasbord of recipes, restaurant reviews, party hints, video tutorials and coverage of the marketing and culture of food. What I have used the most is their reviews of sushi restaurant. If there is a place I have heard of, I can be almost sure that it has a review on this site already. Here is what they say about themselves:

CHOW is a new kind of food media. Not only is our subject matter different—about the parties you really want to go to, the meals you really want to eat, the gear you really want to have—but we deliver it to you in audio, video, and everything else the Web’s got to offer. Come to us for recipes, instruction, news, entertainment, discussion, and advice. And come often—we update the site daily.

You should take a look. Steal upon these foodies experiences. They know their sushi - among other food!

Link:
Chow.com - Food, drink, fun
chowhound.com - for those who live to eat