http://img684.imageshack.us/img684/202/eq000978.png
http://img687.imageshack.us/img687/8061/eq000980.png
Downside is no text mana display.
It's easy to set up, just right click the current chat window -> New Chat Window. Then right click the new chat window and filter ooc into it.
Careful resizing the windows though, if you make them too small the client immediately crashes.