I updated the blog here to Movable type 4. It was extremely painless. It even inspired me to fix a whole bunch of stuff that was wrong with it. Specifically email subscriptions to entries now work.
The new backend it very cool. It took me a little getting used to, but now that I’ve got the hang of it, I’m extremely pleased. There’s a lot of new features, and I’m looking forward to giving them all a try.