I'm using Feedburner to insert occational ads to my feed and to the end of some of my blog posts. It's mainly part of the experimenting I do here on eirikso.com. I want experience with adsense, feedburner, affiliate programs and so on. And sometimes it adds a bit of fun that I don't have complete control of the ads that show up.
My last article asked the question "Where's the big money?"
One of my readers sends me a screenshot where the ad has answered the question.
I don't know if you have noticed, but with my last redesign I removed the adsense ...