Do you have a computer or server sitting around running Linux, and want to help out a good cause? Then you should check out one of the active Archive Team projects. "Archive Team is a loose collective of rogue archivists, programmers, writers and loudmouths dedicated to saving our digital heritage." Basically, this wonderful group of people monitors the internet for sites/services that are about to disappear, and do their absolute best to make sure these things are preserved. 
 
I wish I would have got involved with this earlier, but as I was walking out the door from McMaster I stumbled across the MobileMe project a figured I could throw some bandwidth at it. If you are comfortable with installing software on the command line, a little bit of get, and compiling then you should throw in a helpful hand! (Or, if you are a bad ass programmer, you can help write some scripts for projects that need a hand.) The instructions on each project page are pretty straightforward. If you have a question or need a hand to get going, pop into the IRC channel or just ask me.