Coreboot has great documentation and community. I once "corebooted" my X60s with a picture of my family and contact details in case the laptop is lost. The laptop was never lost, but my wife loved the picture of the _very_ early boot stage.

It's a great project from user's perspective: healthy community, very interesting, quick-reward project to play with.

If you have a spare compatible thinkpad, I highly encourage you to try it out. :-) IIRC, there is a patch from me in coreboot -- it was so easy to prepare and submit one.