For now, use the search engines. Words like howto, walkthrough (walkthru), "X Window System", tutorial, howto, walkthrough (walkthru), etc.. I don't have a 770 yet so I am somewhat limited. Plus, I'm not a programmer or sysadmin so that limits how much I can help. Somebody who knows this, though, should step forward. Too bad we're in the Printer Forum!

http://www.linux.org/docs/ldp/howto/XWindow-User-HOWTO/

What we use here is a line like this, and it's embedded in a desktop icon with an instruction to leave the terminal window open.

ssh -X username@ipaddress /clientapplicationfilepath

SSH establishes your security. If you're doing this over the WAN you should use it, and it involves a password. On a secure Lan you wouldn't need SSH. If the remote computer is behind a firewall then you have to have port some port open (port 22 is the default for SSH but it can be any port) to poke through it. If you use another port, say 2222, then the instruction is

ssh -X -p 2222 username@ipaddress /clientapplicationfilepath

Get familiar with the concept of exporting displays, too. Yes, it's definitely time for a 770 remote X tutorial forum here! I'm ordering a 770 as soon as they're available and the apps that I've developed will be available very soon after.