Contextual Ad Preview Tool

I was sent a link today for pretty cool Contextual advertising preview tool. It allows you get sample ads from Google AdSense (regular text, link units and graphic banners), YPN and Chitika. You can plug your URL in and get a pretty good estimation of what type of ads will be showing. If you've just gotten approved to YPN and wonder what type of ads will be showing this could be helpful in letting you decide. The page does load a little slow so be patient.