BuddyPress.org

I worked nonstop this weekend to finish up our own advanced importer we started a few months back. Allows you to do a full import of a Ning network’s users, their custom profile fields, and avatars to BuddyPress! It reallywas a bit of work to scrape avatars from the profile pages but looks real cool while importing. Full support for very large member lists via optional FTP upload and batch processing so it won’t timeout on you.

http://premium.wpmudev.org/project/ning-to-buddypress-user-importer