On my "other" blog, I seriously need a new comment System. SixApart's TypePad Connect seems to be not much more than a poorly realized vision (maybe Motion will be better?). So that leaves IntenseDebate or Disqus.
Sadly, both of them are heavily geared towards WordPress not Moveable Type, which I have on my blog.
I really don't want to transition to WordPress, I've always used MT (well, since GreyMatter went away - how long ago was that???).
Disqus had my interest, until I read that it would not work with MT unless you used static archives (I prefer dynamic - saves space).
Well while I, ahem, debate this, here are a few helpful links:
Why and How to Integrate Facebook Connect with Disqus
Import FriendFeed Comments into MT
UberVU - what IS this?