For those you are wondering how does YPN ad block look like, the ad format is, basically, the same as Google Adsense.
YPN was launched last August 2005 and currently under beta testing, hopefully, until the end of this year. Publishers in U.S. and with large number of traffic are the only allowedin this Beta test. Publishers evaluation of YPN said that it has a higher CPC than Adsense but the ad targeting is a little down compared with Adsense. Hopefully, YPN will be also available for small publishers and outside U.S.
« Adsense Tip for Bloggers: How to Remove and Avoid Blog Related Ads
Google Launches Adsense Referral Program »