Drupal/PHPBB integration sites?

I suppose it depends how integrated you want it. I'm guessing you don't already have a vbulletin install else you wouldn't be looking for another solution. When I made the decision to move my site to Drupal, I was adament that I wasn't going to sacrifice my big userbase from vbulletin. I've stayed clear of vbdrupal because it was overkill for what I wanted, and it's not the stock Drupal installation, so any changes to stock Drupal will take time to filter down to their branch. I also reviewed the Drupal Vb module, which I also chose against.

All I wanted was for users to be able to login on the forums and be logged in on the main site, while maintaining my vbulletin userbase as the main one. I did this in a few simple steps.

• Import a Drupal user for each existing vbulletin user, setting all the passwords to the same arbitrary value
• Writing a small bit of code in the index.php of Drupal so I can check vbulletin data
• Changing the Drupal login to be my forums login
• Changing the Drupal logout procedure to point to my vbulletin logout, with a redirect back to the main site

So, now whenever a page is loaded in Drupal, it checks whether the user is authenticated in vbulletin, and if so log in their Drupal equivelant user (using the static password we chose). If no vbulletin member is logged in, simply log out the current user from Drupal.

That is the only integration I really wanted, as you can easily create a block to show latest posts yourself using vbulletin external script.