Much ado about FeedBurner worries:
I asked this question a few months ago and then learned that I can use a simple mod_rewrite command so the link to my feed still stays coming from my server. I can forward my feed’s link to any service I want. So if FeedBurner goes belly up or suddenly charges too much, I can simply serve the link from my own server.
Drawbacks are folks that use TypePad or Blogger and aren’t commanding their own server for their blog.