I don't have a lot to add other than I'm still using a T61p several times a week. It's got by far the best screen[1] I've ever had on a laptop and the keyboard is also lovely.

It's running Win7 and I only use it for RDP onto work. The battery is screwed, perhaps lasts 10 seconds so just enough to cover quickly moving it.

[1] 1920 x 1200 and very matt. It's just stunningly clear and easy on the eyes with great colour rendition.