I currently have an OS X server (running 10.8.2) that has irssi installed, and is set up to send Growl notifications to my laptop when I am mentioned or have received a private message on IRC. However, Growl only appears to have options to start when a graphical login is done: trying to run it in a terminal over SSH gives:
$ /Applications/Growl.app/Contents/MacOS/Growl _RegisterApplication(), FAILED TO establish the default connection to the WindowServer, _CGSDefaultConnection() is NULL.
Running it as a launchd daemon also doesn't seem to work, as I can't use growlnotify to create a notification.
It runs normally when started as a login item or via the Finder, but this is unideal for a server machine, where I only want to login via SSH.