And I wish Google well in this realm. Given yelp's somewhat shady practices, I welcome more competition (well, I would welcome the competition regardless, but especially in this case).
My company's currently the subject of sabotage on yelp, and it's having a pretty substantial effect. Now, I don't think that yelp itself is responsible, but they make it pretty easy to attack competitors if you've got no scruples. Check my hn username and email me if you want specifics.