I have a Dell 600m, on which I run Windoze XP, because that's what I need for my work. It works fine with Ubuntu and Knoppix, though neither recognizes its wireless networking card. Ubuntu looks to me to be a nice distribution if you plan to use your computer, as many do, for internet access and word processing. It's a "user" distro. Knoppix, on the other hand, is a "kitchen sink" distro, containing just about anything anybody could want. Personally, I like Gentoo, but you need to be somewhat of a geek to use it. It allows you to tailor your own build from source, and has the nicest release maintenance system I've seen; no more library version mismatches, as long as you don't mind being a little behind the bleeding edge.