chat systems (Score 4, Informative)

Personally, I use Aerial Chat(configured on my site: http://www.cataromance.com/chat/xindex.php -- the project: http://freshmeat.net/projects/aerialchat/). It's the one I settled on after trying out at least a dozen others. The problem that I've found is either they're difficult to set up or they don't work on everyone's computer. This one has a safe mode for older browsers. What I'd really like to see in a chat is the ability to moderate the chat when we have a guest speaker. Still waiting for that option. If anyone knows of a good one, let me know! :)