How about Xubuntu? Personally, I prefer Xfce to Gnome or KDE (though that's very much a matter of taste), and it's lightweight enough that I've had it running o

How about Xubuntu? Personally, I prefer Xfce to Gnome or KDE (though that's very much a matter of taste), and it's lightweight enough that I've had it running on P2s with 64MB of RAM. There's also Gentoo, which I've had running on just about everything (Sparcs and MIPS included), but it takes some dedication.