I’m running the custom Xandros OS (based on Debian) on my Asus EEE, and have been slowly figuring out the basic Linux commands in order to run more than the included software (Firefox and OpenOffice are fine and all, but without GIMP, WINE and DOSbox, it’s a little limited). I learned on an old 286 laptop (which was roughly as heavy and portable as the desktop iMac I’m using now). Since the Linux command line isn’t all that different than DOS, much of the same logic carries over. It’s actually something of a kick to use that part of my brain again.
I’ve been thinking about changing the OS to something a little more user-friendly (the custom Xandros mod is designed to prevent you from fiddling with it too much, meaning that most significant changes either have to be done in the command line—hidden with a macro, not accessible from the desktop—or in the KDE-powered “advanced” desktop, which you can only access after installing it from the command line.
But I could be sold on Ubuntu, since I’m not exactly sure what the differences are. From everything I can tell, the two are very closely related. I’d have to have a pretty good reason to switch over.