I'm a novice forum admin, as I only run one. I have a community as part of www.moonlightfans.com, which is my fansite for the CBS TV series Moonlight. I use the Joomla! CMS, and there's only one native forum component... Fireboard. While production and development on the software was going really well for six months, it randomly came to a standstill, and developers abandoned the project, which is an unfortunate side effect of Open Source. Fireboard has alot of great features, but is just not efficient at all at utilizing server resources. It's pretty much the single reason I had to switch from a shared to VPS server. So, if you use Joomla! and are considering using Fireboard... DON'T! It's not worth it at all. Rockettheme is developing a PHPBB3 Bridge, which looks very promising. Also, there's a SMF bridge out there which works remarkably.