Dell is also slowly starting to stop selling Vista. They recently brought XP back.
as I saw the picture with that Dell computer and ubuntu: I just installed ubuntu on my iBook with beryl as window manager and I really like it. Everything works pretty good, I even got the airport running. Wouldn't be a complete replacement right now for OSX on my MBP, but it's nice to play a bit around. And the eye candy of beryl is just amazing! :dive:
Linux is a kernel
With a Linux based system you have access to many different window managers and desktop environments.
KDE is highly configurable and Windows users can get their KDE system to mimic Windows quite easily.
Gnome is closer to Mac OS in some ways.
There's also Enlightenment, Fluxbox and others.
I love KDE but had to face up to the fact that it's best if I get rid of all my computers and settle on one. Too many cables and too much time playing around with computers and not creating things.
but the biggest issue I still find after a fair number of years of using it is the whole 'dependency <this word is censored>'. For those not familiar, it's where you try and install an application or utility which has multiple dependencies on other files and these can become problematic tracking down and installing and each may have further dependencies themselves.
Anyway, I think Ubuntu has addressed this dependency issue as well as anyone, with the system automatically downloading most dependencies from the repository, which is a great system.
Depenancies are only an issue with the inferior RPM package managers.
Anything Debian based is usually pretty flawless. Gentoo is ok too if you have time to compile.
Gentoo and Debian/Kubuntu are the only Linux distros I could ever use. Anything else was just a pain in the behind.