Says Scoble. From a Longhorn blog he points to:
Q: What is Google doing?
A: I can’t talk a whole lot about this yet. I can tell you that this is a pilot program for a new AdSense product that Google is looking into. Like all of their tests, it may disappear for a while, or be discontinued altogether.
Q: Is anyone else currently testing this technology?
A: No. Right now LonghornBlogs.com is the only site running this test. That will probably change in the next few days as their other alpha testers bring their systems online, but for now, we’re it.
Q: How are you putting ads in the feeds?
Q: When can I start putting ads in MY feeds?
A: IF Google decides to launch this product, you can expect to see a wider public beta in the next few weeks.