I need to import an entire Wordpress blog to a new Drupal install. I want the posts, pages, authors, taxonomy, comments, and the users who made comments. The last one being the hang up, we didn't want to lose any users from the community during this migration.
In the end I used Wordpress Import module, the User Import module, a little manual parsing and some simple SQL and now have 300 new users linked to their original comments. But I took the long road to this solution, read on and I will relate my journey.