I'm also curious as to what voltages people are using for 1.3 and 1.4GHz. Right now I'm running 1.2GHz @ 59. A 470 second stress test hit 38*C max (while charging) with no errors. My Quadrant scores (my usual triple test) were 1708, 1632, and 1622. I'm not sure where that 1708 came from because I haven't been able to duplicate it.
Also, does anyone know what kind of maximum temps to avoid? I don't have much specific knowledge of the Droid hardware or ARM processors in general, and I really like to know my boundaries before I do too much.