Me too have this question. I run step by step to creat google adsense feed. But i have no idea how to make money with it.
Try to read this: https://www.google.com/adsense/support/bin/answer.py?hl=en&answer=20012 you can get on that link some info about adsense for feeds.
If you are maintaining a blog, then most likely you'll have rss feed for your posts. The adsense code now allowed to be included in your feed.