We've set up a Jabber server @umbc. It's in TESTING, not production, so there will probably be some changes, downtimes, all that fun stuff.
However, if you'd like to use it, feel free.
Jabber ID: username@umbc.edu
Password: Your MyUMBC/Kerberos Password
Connect Server: jabber.umbc.edu
Choose "Use TLS Encryption" in your client. If you don't, you won't be allowed to authenticate. "old style" straight SSL is currently disabled, because I can't seem to get it authenticating for some reason.
We're configured with appropriate message routing, so you can chat with folks in other Jabber realms.
When we go "production" with this service, we'll be mucking with the Jabber ID portion of the system. You might have to "choose" your JabberID from MyUMBC before you use Jabber for the first time, or something like that. We'll let ya know...