I am searching for documentation on the format(s) WordPress can import because I need to import 188 posts  from my current home-grown blogging system. These posts exist in both a mysql DB and as XML files on disk (flattened for publishing). What is the shortest path to get these imported into wordpress? I can export the posts to look like whatever format is the simplest; they consist only of titles, dates, and bodies with well-formed xhtml markup (no comments or additional metadata).
I imported a test file in the MT export format  into WP using the import-mt.php template but it didn't work -- the post shows up in the wp-admin console but the post body is blank.
Is the MT format that WP imports the same as the blog format that MT imports? or do they differ?
thanks in advance,