How would you launch a Yelp-like site?
byrneseyeview: Do what Yelp did: try to launch a totally-unlike-Yelp site, and realize that Yelp is what your customers want.But seriously: that sounds like a valuable app, but it's hard to tell how you should launch without getting some details. Maybe you can start giving feedback to businesses you patronize, and just contact the first few businesses you review ("Hey! You just got a suggestion on FeedbackJar.com!").