Cool how much, and over how many sites are you using it?... I am thinking of using yahoo to see what its like, I am currently only on Adsense
I been with ypn over a year now i guess, I got it on about 3 sites avg about 3k impression a day, they ctr sucks but they pay more then google, so it evens out, at least in my case, i run google and adsense but not both on the same sites. Good luck getting accepted they are kind of picky, and its not easy to get in.