Did you get a solution to this? I’m experiencing the same problem.
I imported two blogs tonight using the WebbleU method mentioned by justinbaeder and got posts, comments, and images. The only hitch I had was bringing the SQL database from the temporary wordpress blog to the permanent one. The problem came in the form of a duplicate entry found in the SQL entry. If this happens, go to the admin of the new/permanent blog and delete the post, comment, and page that the wordpress install automatically creates and do the SQL query again. Smooth as could be, although it was quite involved.
