So far, this Thinkpad T60 has been one of the best laptops I've ever worked on, although I am a bit biased because I've owned many older model Thinkpads in the past. I still have a Thinkpad 240 and a few Thinkpad 600Es in various configurations. The T60 4:3 model will still be available but now there is a 16:9 model available. You can read a review of it here.
Ok it's a year later, but you really need to move up to T61 if you haven't done so. I've got mine for 2 month now and it beat anything else I have had my hands on. You can check my blog for my small review.