I have a 933, but it's unlocked so I'm not sure how much the temps would differ from regular retail chips.
At default(933/1.65) my temps are:
Room - 25
Mobo - 29
CPU/idle - 36
CPU/load - 45(no matter how high the mobo temp gets)
I thought the temps were a little high when I was getting 43 with my FOP38, so I put on a PEP66 with 27cfm YSTech fan and now I'm getting the above temps. It's ok though, the noise reduction is well worth it.
Anyways, since the chip is unlocked, I can run it at 8*133(1066) at default voltage no problem, and I've been up to 1136(8*142) at default voltage(38idle/48load), could probably hit 1200 with mega volts, but my temps are high enough, I don't want to try.
There is some breathing room with these chips, maybe not as much as a TBird, but the lower temps and higher stability are worth it for me.
Realistically, I'd say Ginfest's overclock is the high end for the FSB on Intels, anymore is pure luck.