Google adsense Alternative

I am looking for Google adsense alternatives , my site is getting close to 400-500 users/day and using Yahoo adsense i am getting on an average 50 cents/day which is tool low.

I tried Tribal Fusion ,i like tribalfusion but to get eligible to run tribalfusion ads on your site you need 2000 unique visitors/day .

So i am trying few other sites like Adify. I will post my results here .