I'm running 7 on a thinkpad t43 (see specs) and I have to report that it is excellent. Performance is about equal to XP, massively better than I expected. I can't say it's faster, but it's not any slower than the well maintained XP installation it's replaced. As reported by Azural, windows update supplied all of the drivers
. Everything works, including the fingerprint reader (using windows supplied software) and bluetooth. The only drawback is that mine has the intel gma 915 graphics, so no aero. I don't know if the Ati X300 adapters work with aero.
Specs on these things are about that of a netbook, but I think performance is quite a bit better. For what these things go for I think they are an excellent deal, especially since they run 7 just fine. Most are off corporate lease, in good shape, and about $300. Built like tanks, yet lightweight.