A lot of developers have complained about the App Store feedback process. For one thing, nothing prevents a rival developer leaving a bad review. For another, Apple only solicit reviews from dissatisfied users. What can be done to get better reviews to counter-balance the bad ones? Maybe we could invite happy users to leave a review...
I'm a little sceptical that this will work. As a developer it's easy to imagine that a user will be happy to sing the praises of your application. As a user, however, my time is precious, and it's just too easy to hit the cancel button. Having a "Review this app" button on the Info page might work better -- I'd be interested to see what people think though!