The site that I work for www.dabow-inc.com already uses such tools as adwords from google. We only resorted to this sort of marketing, because our own attempts at SEO management have failed. Mostly, because our market is small. Anyways the adwords programs would become too expensive to use if that was the only way to get our site out in the public eye. I don't know what others are paying, but we pay between $0.84 and $2.00 a click just to be in the top ten rankings. Give that too many clicks and our daily budget is gone before lunch. Something like this could really hurt google when small business owners start moving to more economical search engines.