Well, I finally got mine up a little higher but it required some serious voltage to do so... 455 is the highest I can get the FSB Prime Blend stable. 460 will fail 1 or 2 cores after max 5 mins and 470 will just freeze as soon as I set it with SetFSB.
But so far 455x8 for 3640MHz on the CPU seems stable on air with these voltages:
CPU: 1.45V (reads 1.472V in CPU-Z)
NB: 1.66V
CPU_VTT: 1.603V
Mem: 2.19V
GTL 1/2: 120
GTL 0/3: 119
GTL NB: 120

Tomorrow I'll try some gaming with Supreme Commander and World in Conflict to see how it handles it at these speeds.

And in the next couple of days I'll throw on the Vapo LS to see what some freezing temps will do to this chip!