I don't think I mentioned that Movable Type 3.0 absolutely rocks. I have been using it for about a week, but I haven't had time to make TypeKey work and of course upgrading required some template changes and wiped out my local hacks, but except for a few cosmetic things I think most things are working alright again.
The UI in 3.0 is much slicker than in 2.6 and it's much better about letting you delete spam than 2.6 was, so much in fact that I'm not in too much of a hurry to get TypeKey working.
Ben Hyde wrote some, as always, thoughtful and interesting comments on TypeKey. Two Problems, The Universal ID and The Central Authority.
I really need to finish the new version of my single signon service...
