The GeoShell Website
The website, as you probably knows, has a very helpful user support forum... insert more description and links, etc.. mention that the forums is usually the best way to get help, if you have time to wait for a response.. though our response time is usually extremely good..
#geoshell – The GeoShell IRC Channel
If you prefer a more direct contact method than the forums allow or you would like to try to get an answer faster, feel free to jump into the GeoShell on IRC* channel at freenode.net. add links and stuff
*irc = Internet Relay Chat