I‘ve blogged several times about how I migrated my e107 site to WordPress. You’ll find all the posts here.
Anyway, a quick note to say that the author of the script I used to make the migration has left a note to say it is being updated.
If you are looking to make this change then now might be a good time as you’l be able to get hold of an import script that is compatible with the current versions of WordPress and e107.
Check out his comment here.