While nothing new, ads via RSS feeds aren’€™t as widely used as regular ads on your site or blog. My guess it’€™s because you don’€™t really know how to handle it, it’€™s a lot more of a bother to hack a RSS feed than just put some Adsense code in your sidebar.
Enter programs who do this for you. Feedburner has been doing it for some time now, and now Text Link Ads has launched their Feedvertising service. It seems easy enough to get started with, but if you’€™re uncertain you can check out Tubetorials’€™ video on the matter.
I predict at battle for the feed ads in the future. And when will Google go there with, er, Feedsense?