MT2SP Blog Migrator will migrate a movable type blog to a sharepoint blog.
Support is included for transforming post data (media links) to a new location (i.e. sharepoint list)

Note that this is a tool written specifically for the purpose, it's not pretty and could do a lot more, however, it's done the job and the task is now complete. As far as my support goes, it's unlikely it'll see many updates now as I have no need to further it myself. It could automatically create the categories by pulling the out of the export then creating them on the fly, it could also clear down the lists before it posted to them, or even post the images to lists. All of this is possible via the lists web service which i've used to post the content. You'll need to mess around with some CAML but adjusting the code should be very easy after a bit of googling.

The process goes something like this:
1. Create an export of the blog content from the Movable Type Admin interface
2. Extract all supporting image data from the MT server, retaining folder structure
3. Create sharepoint blog site
4. Create lists within sharepoint blog site to contain image data
5. Insert image data into lists
6. Run tool, point it at the sharepoint blog lists web service, give it the MT export file & tell it about the transformations you wish to make to the referenced image/media data
7. Watch in amazement as the tool uploads the data to the sharepoint blog, reconnecting it to the newly positioned media.

Requirements:
* Sharepoint server blog

The license of this software is Free, you can free download and free use this blog software.