vBulletin/phpBB account creation
 

Is there some way to make vB write to phpBB's tables and vice versa, so that two sites running two different forum softwares can have identical userbases (not same database, just a duplication)

look at the vbulletin application connector
i have created an module for com_connector ( joomla ) for phpbb
you can easy port then to vbulletin

with this module you can synchronise the vbulletin with phpbb users ( by first login, later by registration too )

Thanks, I'll have a look at that!