Linux On a Mobile PC and you can vote for your favorite distro that you would like on your ThinkPad. I have had Ubuntu on my Thinkpad(s). I have tried many other distributions but Ubuntu gave me the least trouble and of course that is what I voted for!
If you have been shouting about manufacturers not providing Linux with computers, then this is the chance for influencing one of the largest notebook manufacturers in the world!.
Here is the link to the article,Linux Follow Up by Matt Kohut