I love Ubuntu!
What on earth is "Ubuntu"? It's a Linux distribution... but you really ought to read a PCWorld.com article to learn why that's of any interest at all. I'm running it on a friend's old eMachines -- one that wouldn't even run Linspire 5.0. It's a 366 MHz Celeron; the only decent thing about it is its 256MB of RAM. Yet it's clipping right along with Ubuntu. Need a spare place to surf the web? Grab an old machine, throw Ubuntu on it... and, yes, I know that "throw Linux on it" is a common phrase, but Ubuntu actually makes it possible! You'll be hearing more about this!