Updated to MovableType 2.21. Just posting this to test if pinging weblogs.com works (there’s a much more sophisticated feature called TrackBack, which allows peer-to-peer notification instead of just client-server, but it’s clearly non-trivial.
Just shows you that development of this is driven by techies. Instead of giving MT a real built-in search engine, they spend time doing bleeding-edge stuff.
Although since the other big new feature of this release is the option for a MySQL backend, perhaps they wanted to do that before they started on search.