This looks like an interesting program from Google to help eliminate click fraud..

http://services.google.com/payperaction/

Basically, instead of a publisher paying for each and every click that their ad sends, they pay for each specific action the surfer makes.

So if you want to pay someone $1 for each time the surfer adds something to their shopping cart, for example.

Its basically the way PPS started off and im glad to see it making its way back because it was a really good business model for paying affiliates and is still highly popular in the non-adult world

Regards,

Lee