Quote by element: Is there a way to integrate the users of phpBB into the users of Geeklog so that the accounts stay the same?
Account integration is one of the main things that this plugin does.
What this plugin doesn't do is integrate an existing install of phpBB with Geeklog. You have to start with a clean install of phpBB. However, there are rumors that Blaine of portalparts.com fame may have the magic it takes to move existing phpBB installs to Geeklog/phpBBBridge. If that's what you need to do, I would contact him.