Recently in WordPress To Movable Type Export Category
Download it here. It contains a bug fix for the trackback output that generates the dates the same way that it does for the comments. Let's call this... version 1.3....
I installed Movable Type 4.0 on a test domain and database, and lo and behold, it appears that they have completely dropped the original import system. This means that if my WordPress to Movable Type Export script is to be able to help out people who are using Movable Type 4.0 (when it comes out of beta), I will have to rewrite much of it from scratch. The new backup system is actually very slick, but it is actually now for storing an entire blog it would seem. That's a real change from the days when it just exported entries, comments and trackbacks.
I incorporated Jim Carson's bug fixes into the script, and now for lack of a better version number, it's been moved up to version 1.2. So far, so good with the export. I tested it on my fiance's blog without any discernible problems. Obviously, if you encounter any bugs, please leave a good description of the bugs in the comments section.
If you need to export your WordPress database to Movable Type's export file format, you can use this script which leverages WordPress' APIs to make it relatively easy to move back and forth between these two blog suites. It's free, no license. Download here.
