hehe, hey dood, i recon the best BB i m come accross to is XMB BB its easy to install, but requires the server to have PHP and MYSQL which often most servers dont
Another PHP and MYSQL free BB software would be the open source version of PHPBB, not that many great features, but does the job .
There may be others, Ikon Board( free CGI version of a BB program)
Also there is YABB(Yet Another Bulletin Board) similar to Ikon Board, but i dunno if better or not.
XMB : www.xmbforum.com
Ikon Board : www.ikonboard.com
YABB : www.yabb.com
PHPBB : www.phpbb.com
there may be others if u wish to pay some money for then u'd rather get
CGI version : www.ubb.com
VBB : www.vbulletin.com
cya i hope it was a help