true_INFP - 10:36 pm on May 8, 2010 (gmt 0)

I'm afraid that AdSense being a real-monopoly and the recent AdSense-integration of many of the third-party ad networks you mentioned are not really making it easy for a real AdSense competitor to appear. Yahoo was promising and they ended after a few years of trying to come out of beta. Microsoft seems to be getting nowhere. The future looks like Google...