Damn, you guys dissed vbulletin for phpbb? That really discredits you guys on how knowledgeable you guys are, whenever i see a phpbb forum, i think of webmaster newbs. If you cannot setup a vbulletin forum properly which is cake as im a master at it (http://www.ndgclan.com is a vb site i made for my clan), then how should we trust you on good scripting of the server? Sure, it shouldn't matter what forum software you use, but for most control out of any forum, phpbb does not have that as much as vbulletin, though you will find newbs who think so.
Well it is your guyses project, but very unwise to go with a open source forum, which has many exploits over something like vbulletin which is extremely tight in security and easier to mod. But then, this site is phpbb, and it does work, but not at full proficiency.