Just want to toss in that Lenovo likes to cripple certain features in hardware, e.g. limiting SATA II speeds (http://forum.thinkpads.com/viewtopic.php?f=2&t=84953), disabling stereo mix (http://forums.lenovo.com/t5/T400-T500-and-newer-T-series/Is-...) and whitelisting wifi cards (http://www.thinkwiki.org/wiki/Problem_with_unauthorized_Mini...). I think at this point they stopped mucking with SATA, but new models still require "approved" wifi cards and disable stereo mix in hardware.

For those who enjoy the ideas behind Linux, Lenovo is not exactly the greatest manufacturer.

[Edit] And apparently HN does not use Markdown, or I was doing something wrong before.