This isn't really a bug report or a feature request, but a comment. I think this module might be end-of-life with Drupal 7. In d7, passwords are no longer hashed with MD5, so exporting to external databases probably won't be feasible in the future.

See also: http://www.chapterthree.com/blog/josh_koenig/howo_use_drupal_http_authen...