Yelp is fine and good when you want passionate/brutal rants (and, occasionally, raves) about any and every store. For a more focused, and likely refined, local search, try long-standing foodie site CHOW's new restaurant guide.
CHOW, the site hosting the forums better known as Chowhound, pulls reviews and comments from its deep forum archives and articles to provide lists of the best-reviewed grub around, as well as fairly sophisticated category filtering. Tastes are personal, of course, but where CHOW might really come in handy is finding a certain cuisine in a particular city. "Where can I find good X food in Y?" is a fairly common query on the Chowhound forums, and getting those questions and answers sorted in a search is a helpful thing indeed.
Best of all, CHOW's launched their list with a fairly big list of cities, rather than the New York/San Francisco start-ups we're so used to seeing. Give it a go in your own neck of the woods, and tell us all how it fared in the comments.