I'm running my own Jabber server for quite a while using ejabberd. I was a bit uncertain if an Erlang based application is the right for me, but ejabberd runs just fine.

At some point I ran into the problem that my new company only allow access to the internet via a Squid proxy server. I therefore wasn't able to connect to my server any longer *sigh* I was looking for some alternatives that would allow me to have ICQ at my fingertips as well.