Jabber
From Jon's Wiki
Hi... so you should be able to log in with the same username and password, but at chat.openblue.co.nz - i.e. username@chat.openblue.co.nz instead of username@openblue.co.nz - this makes a bunch of stuff easier in the meantime (if I had DNS SRV records configured cleverly, the original accounts would work too).