Chiming in late, but what the hey...
vBulletin & InvisionBoard are probably the "cadilacs" of message boards, I would agree.
However, I've done more postNuke/PNphpBB2 installations than I can count in the past year. phpBB2 is much more secure than the original phpBB and to my knowledge most, if not all, of the former security holes have been patched up and closed. The features and look/feel of it also have been vastly been improved and it *almost* looks like vBulletin now.
Best of luck with vBulletin though. It IS a solid board - why else would GG&J gone with it?
