LOL, really? The soc is underclocked to 1.2ghz, 1.5 is the true stock speed. I bet we hit 2ghz w/o any problems
I have not looked the the chip specs to closely, but if it is underclocked then ya you are going to beable to to jack thing over the 1.5 range. But a 25% boost can and should cause power drain as well has excess heat. you have to remember they crammed a whole hell of a lot into a small space.
The webos community has gotten the Palm Pre up to 1 ghz, rock solid, that's coming from stock 500 mhz, and the chip being rated at 600 mhz. In fact, many Pre's are able to run at 1.2 ghz, though some of them are pretty unstable at that point. It's luck of the draw if your hardware can take that kind of overclock. I run mine at 1 ghz every day no problems with decent battery life and no unreasonable heat. So never say never, I bet we see some the Evo 3D get pushed pretty hard.