There is absolutely no comparison. Adsense is 10X better than YPN. YPN has turned into a joke - they aren't even trying anymore. That might change with the Microsoft deal - and while MSN isn't on par with adsense yet, it shows great promise - they just need more advertisers. If you don't live in the US, you don't even have a choice as YPN doesn't take publishers from outside the US.
East or west, Adsense is the best. If you work hard on your website, you can get more revenue in adsense. All the best!!!
Google is the best on what they do best - search. Yahoo could be top on emails but for anything search google is still the heaviest gorrilla.
I have a question: how in the world do you get approved for a Yahoo Publisher account? We have a top-quality site and generate more than 300,000 unique visitors every month. We have applied for a Yahoo Publisher account and have not heard a word in more than 7 months. Any advice??? Thank you!
YPN already has more publishers than ads. The last thing they need is a high volume site - which is probably why you haven't heard from them.
Google Adsense of course. I like google better than YPN and there are more advertisers on Google as well.