How is that T60 holding up on BSD?
It's great. It's my main machine 90% of the time. They're probably the best laptops out there for running OpenBSD because a lot of the developers have ThinkPads, so the hardware support for them is usually very good. Brand new ones might take 6 months to a year or so for the development to catch up, but the the T60 is old enough for everything to work out of the box. Stuff like the wifi, backlight buttons, volume buttons, etc working with little to no configuration saves a lot of hassle.
I get 6-7 hours of battery life with the extended battery if the brightness is at a minimum. Mine is running an SSD, so it feels pretty quick, though the FFS filesystem lacks Trim support. The CPU is fairly capable and SMP support works fine. These came with either integrated Intel graphics or an ATI Radeon GPU, both of which are supported very well in any of the recent versions of OpenBSD.