For anyone who has ever needed a solid recommendation for a local dermatologist, sushi joint, manicurist, or florist, chances are yelp.com has been consulted. That’s why I was eager to attend a recent luncheon hosted by the folks at the San Francisco PR Round Table, where the guest speaker was Vince Sollitto, Communications VP at Yelp, Inc., who spoke about the evolution of Yelp and the power of user-generated content.