I've been working almost 2 days on moving our usernames, emails, and passwords from punbb to phpbb3 as described in responses to the post
viewtopic.php?p=13220803.
I've just about given up getting this solution to work, but if someone who has done this successfully could post a couple of before/after examples of username/email/password/salt database entries that have been successfully converted from punbb to phpbb3, I'm thinking I could just throw together a few scripts myself.
Dustin