Check out the various companies who sell PCs with Linux onboard, such as:

http://www.justworksnh.com/
http://www.penguincomputing.com/

All sell systems with various Linuxes pre-loaded. JustWorks sells Mandriva, Penguin Computing sells RedHat.

Anywho. There are options out there for those who don't want to pay the M$ tax. :)