I have a site that has articles on the page and also the ypn ads that look very similar. Can you tell me whether or not I can do this. I asked YPN and they said it was fine. But someone keeps telling me that I can't do it. Here's the URL: http://www.naturalencyclopedia.com/articles/
It looks just fine to me. Don't take YPN word very serious because one tells you that you are fine and the next person says NOPE. And when you tell them that their co-worker(s) said it was OK they'll say this a beta program and things change overtime. Since they have the ability to boot u the logic says just do what they u to. I'd say keep running those ads until they tell u to stop.
Change "Updated Hourly" to Advertisement, so that your ads are clearly labeled as "Advertisements" and I wouldn't worry about anything.
It's fine, if YPN has a problem with it, they will email you. I do have to say though, nice blending... If YPN had better targeting, I could say that'd easily fool anyone.
allways try to check with yahoo if you have any doubt. they have great support team [atleast better then adsense]