MovableType 5.2 is almost out. From what I’ve seen on the MT and ProNet mailing lists, 5.2 is a pretty good release.
A while ago I moved the blog over to the OpenMelody, the OS fork of MT 4. With activity on the OpenMelody project slowing down and seemingly heading into dormancy, I’ve been giving some thought to moving back to MT. It will take some planning, but I think there shouldn’t be too many problems, except maybe for the archives. For some reason the archives always break.