For those teams interested, you can also check out BOB!, the FNSNET chatroom that does not use Java, so it is safe to use at school if your school has security settings that do not allow certain javascripts (like our school).
Any team that joins FNSNET will have direct access to BOB, and anyone that visits your site can follow the link and leave messages.
http://teams.fnsnet.net/bob/index.php