Apple has said that the new iPad's operating temperature is within its design range of from 0 to 35 degrees Celsius. Tests by a Dutch team have shown that the new iPad can run at up to 33.6 degrees.
That's certainly hot by anyone's standards, but not too hot, according to Apple. The same Dutch team says the iPad 2 has tested at up to 28.3 degrees.
My own iPad has never even felt warm to the touch when running flat out.
If you're considering a purchase in the medium term you have time to wait and see how this temperature issue pans out. My personal view is that holding a device that was running at 33 degrees might become uncomfortable after a while, and at that temperature I might wonder about its life expectancy, but I'm not an electronics expert.