Good article Solo.
I use dreamlinux on my old laptop, it was easy to install and cost me nothing. It installed with Blender, Gimpshop, Inkscape and a few other design apps. I've added Cycas for cad work and would have to say it's a very nice lean system. Open Office is excellent too. I've had no problems transfering files to windows or commercial programs.
There seems to be plenty more 3d/cad apps in development for linux at the moment:
http://archimedes.incubadora.fapesp.br/portal/project/archimedes-project/
http://avocado-cad.sourceforge.net/
http://www.octree.de/
This is a controversial article about a design lecturer who switched all his design students from OSX to Ubuntu and replaced all the courses proprietry software with open source alternatives. It makes for a good read, and the following comments raise some good arguments for and against.
http://www.linux.com/articles/52758?&depth=5&order=1&sortby=3&render=flat