I'm getting the crash/reboot problem too, both with FreeBSD 4.7-STABLE and FreeBSD 5.0-CURRENT (from yesterday) after running something OpenGL more than once or twice. I have no DRI in my XF86Config either....
I thought it was just random reboots, but now it appears that it's actually a panic so i'll have to learn how to setup a serial console i guess
if I manage to get some output, what use would it be and where exactly would I have to report the problem and send the dump?
Has this issue been solved already?