I had tried many different options to use as the alternate ads in Adsense, but for my sites nothing seemed to work. Then I decided to simply send those impressions/traffic to my other sites, but I dont have that many sites.. So the alternate ad exchange was born.. http://www.articletrader.com/adsense/ Essentially it works like a banner exchange, except that you can use it directly in the google code as alternate ads. (All the ad sizes is present, even link-unts!) If you show an unit that displays 3 ads, you get roughly 3 ad impressions on other sites, and also extra credits for every click from your site. You can setup the ads to blend in to your site, and I also added a simple referral system. Let me know what you think