I've spent hours reading up on various modules to use external forums in Drupal. I've been quite happy with phpBB, but of course I don't want members to have to maintain TWO logins and I'd like the integrated look.
When I first started looking at Drupal a week ago, I saw Michelle's forum:
I really liked the looks of that site and I put a link in my notes. So when I found it today as I was looking at every Drupal forum module, I decided to go with the Drupal forum, Advanced Forum.
Did a bit of reading at Michelle's forum and she's definitely one of those people who should get grant money to further develop Advanced Forum.
Here's the module link:
I downloaded it, but don't have time right now to do a lot of reading.