You can't have Adsense and YPN on the same page - I'm pretty sure.
"I think G has to recognise that affiliate marketing is a BUSINESS MODEL and driving traffic to an affiliate link or other merchant is also part in parcel of the BUSINESS model."
I just watched a great video about search arbitrage.
Chris over at Pepperjam did it.
He makes an interesting point that tons of big shopping engines like shopping.com and pricegrabber are doing arbi. Buy clicks and resell at a higher price. Yet G makes it hard for affiliates sometimes bumping the CPC from .50 to $10 per click. They would never do that to the shopping engines who essentially are doing arbi too.
YouTube - Kris Jones on Search Arbitrage - Search-Engine Strategies NY
Very good video!