"I was walking down Valencia Street," says a friend of Valleywag. "Some dude on his phone, yacking. I walked closer to listen, and I heard, 'Feedburner will announce an acquisition.'"
Now this could mean that someone's buying Feedburner. (Yahoo? Google? They already have massive ad programs, but Feedburner's RSS ad network could be a growing asset.) But given how this was phrased, it's more likely that Feedburner's buying someone else. I'd guess feed search company Feedster, but that little startup just took more VC funding.
Still looking into this story. If you know more, whisper it to email@example.com.