If I can get a GTX 470 for $350 straight (plus S&H of course), it will be a consideration "maybe".
The whole noise, power consumption, and heat thing is pretty moot in my opinion and in my case. Even with the stock cooler it overclocks very well and I can wait for a nice aftermarket cooler to come out so I can crank up some voltages. But those are fluid circumstances and are dependent on a lot of variables. Most likely? A 1GHz core overclocked 5850 thank you.
Slightly modified from the other thread.
As for that video, it proves that you can't boil an egg on a GTX 480. This is actually common sense and I hope no one thought that it was possible, the heatsink is going to always be MUCH cooler than the actual contact surface, or GPU ship in this instance.
A burn can be caused by touching something about 55c. I doubt many, if any, of us have a CPU that runs cooler than 55c on load. And if you do you need to crank those clocks! Touch your heasink with the CPU at load, you will be lucky to feel any form of true "warmth" as your body temp is about 35c and the heatsink should be around there.
Also note that the entry boiling point of egg whites is about 70c. To boil an egg in any form of good time you will need to increase that a lot to at least 90c. An egg yoke will be a bit above that as well. Now you need to transfer that much heat to the egg directly, which is very difficult even if you put it ON the GPU itself at 100c. Then add in foil if you don't want to ruin the card and you will decrease the heat transfered by about 10c if not more. I highly doubt that even the backplate would be sufficient to boil an egg.