SO before I was rudely nterrupted I was going to post this.
I've been playing around with a laptop here at work getting Linux integrated with Wireless among other things and I have been having a great time customizing it. (Yea its not related to my testing but meh)
Linux has come a long way since the days of command line, the distro I have been playing with is Ubuntu now - it runs sweet and was easy as hell to install. I also installed XGL and Compiz which give you fancy wobbling menus among other things.
All and all - Linux > * (if your not playing games of course) you can do just about anything you can on windows with Email, Office etc.
Eye Candy:
(Click for larger)