It's trivial to move off Feedburner. If Google does anything stupid the whole blogging world will freak and move en mass. I think Winer is frustrated at not having an open alternative to suggest, so he's reduced to fear mongering.
That's perhaps the most useless and poorly thought out argument I've ever read about anything. I found a anti-evolution propoganda pamphlet in an airport a week ago that was more cogent.
