I'm also rebuilding my T60p in place (meaning I started half of it while chrooted, and have now switched over to the newer half...).

I've run into a new issue loading the dri drivers: AIGLX error: dlopen of /usr/lib/dri/fglrx_dri.so failed (/usr/lib/dri/fglrx_dri.so: undefined symbol: __glXFindDRIScreen). Moving to the latest ati driver seemed to fix that (8.37.6-r1).

• ATI Linux drivers for debian has great information around how to configure X11 to work with the proprietary ati drivers.
• Fglrx - ThinkWiki is a good source for how this stuff all works with thinkpads...