Reading between the lines on this thread, I gather there is no problem getting full X functionality (including 3D acceleraton) withATI Radeon Mobility 7500 only kernel 2.4 only X11 4.3 (maybe with patch?) I am looking at a Thinkpad R40.
I confirm that is the case with a Thinkpad A31, using APM the suspends/resume even works under X!
a revolution!