wow this looks sweet, its like what IP.Boards have right? put the spiders in there own group.
and alow only the spider that are in spider display in admin panel. as for vbulletin, the spiders allowed would be vbulletin spider list.xml right? i think thats what your saying above

this would be good to get members to sign up to view the thread they found on google that the bots can only see. nice job