So far I have yet to be accepted by the YPN,. Yahoo Publisher’s Network, though I have been highly recommened to use YPN by various bloggers. YPN is still in beta… emphasizing the still part since eYahoo Publishing Network seems to have been in beta for the longest time with still only USA applicants allowed to apply. You’d think Yahoo would get the ball rolling, since this has potential to make them a lot of money.
In any case from what I’ve read this has been a profitable alternative to Adsense as long as you have the right type of site. Yahoo Publishers Network seems to be more profitable for those with sites without specific content, where sites that have very specific content do better with adsense.