So vBulletin is out? Do you think that software is the cause of the problems David? I've been asked to give technical assistance te revive a Dutch forum running on vBulletin, but I'm hesitating. Seeing this forum moving away from vBulletin makes me hesitating even more. Mind you I don't have experience with it, only used phpBB a while ago.
Never heard about XenForo. Will that system keep on using mysql as a database?