I'm migrating from Wordpress to MT when the opensource version is live.
But I was eager to try out the one nightie and I'am sad to say that your import function is not working as 100% as everyone whish.
My last entry in my old blog was written 6th april 2006. The last entry that the import function did import was written 12th may 2006.
This is very strange and should maybe be looked at.
Also, you would have a sky high old wordpress-users if you have a better documention on how to convert from Wordpress to MT. I would appreciate it.

The best way I found, in the Wordpress Admin, click on 'Manage' and then 'Export'. Leave the drop down on all and click on 'Download Export File'. Then, within Movable Type admin, create your new blog, then click on 'System Overview' -> 'Tools', then 'Import'. Now select the blog you want to import to (the one you just created), from the drop down choose 'Wordpress eXtended RSS (WXR), choose the ownership of the posts you want, click 'Browse' and choose your exported file from Worpdress, and click 'Import Entries'. This worked for me on a few blogs already, one with 300+ posts - so I do think it's working fine. Give it a go and let me know if you have any questions (I've been importing a few blogs, many times, to learn how it works). So far I'm very impressed with MT, and am looking forward to gathering all 6-7 blogs under one install (finally!) unlike the multiple WP installs I needed before.
fak3r
Since I seem to not be able to start new topics, I'll reply here.... Any chance WXRImporter will support importing Tags from WP?