GREAT service ContextWeb.com. I offer free email at Gesture.com and started utilizing their service after permission from them after being dropped from AdSense. Well not entirely dropped, I didn't do anything fraudulent so they let me keep my account and just dropped the ad feed to my site. They simply told me they didn't support this style of service at the time because they don't know how to monetize the ads for that type of traffic. Well ContextWeb.com is right on top of things, so I highly recommend them.

William