netmeg - 3:07 pm on Jan 11, 2011 (gmt 0)
I haven't seen them on my own sites, but I've seen them out and about. Supposedly those ads go into the auction like all the others, which means they're supposedly the highest paying ads available at that particular moment in time.
If I started seeing them all over my stuff all of a sudden, I'd probably work on some text and other clues to improve my targeting and get some better advertising. But that's me.