The T60p's were absolutely fantastic machines. I used mine (got it early in 2007) fulltime until a couple of months ago when the fan died (for the second time. Made very loud grinding noises whenever it tried to spin up.) I still use it on occasion without the fan, making sure to suspend to ram as soon as I see the temperature go past 75C or so. I didn't bother fixing it this time since the price of a new fan/heatsink assembly and a new battery would have been more than the cheapest eeepc I could find on newegg, but I've wanted to get another thinkpad ever since.
Heatsink/fan assemblies are under $10 on ebay, and these laptops are straightforward to disassemble. The official hardware maintenance manual will tell you step by step. It should take less than an hour to replace.
If you haven't yet, you may want to try opening the case and cleaning the fan with compressed air. I fixed the infamous "Fan Error" on my 3yo x61s this way.
