I have just switched this blog to WordPress from LifeType. The mtexport plugin make this very easy. The main thing that the Movable Type Import Format doesn't include is image resources. So, instead of attempting to move the images to WordPress, I just used some mod rewrite rules to redirect those requests.
First, I created an Alias in apache to the LifeType install. (I did this, so I could have access to the old LifeType installation) Then I used the following rewrite rules to redirect resource requests, and requests for the rss feeds
RewriteRule ^/gallery(.*) /archive/gallery$1 [L,R=301]
RewriteRule ^/rss.php(.*) /feed/ [L,R=301]
Unfortunately, with these rules, requests for atom feeds will now return rss feeds.
Now, I just need to pick a new theme.