i personally dont like all the merom threads, but the OP is really not asking (not explicitly anyway) advice on whether to wait or not (now if there's the word "wait" in the title, i'd sound much meaner)
i dont think the mbp burning people with various degree shouldn't be solely blamed on the chip and internal component.
mbp's casing is Al alloy, a metal alloy. metal and metal alloy are very good thermal conductor, which means thermal energy was very quickly transfered from the interior of the computer to your skin, which then you'll feel hot.. mind you, even 50 something deg. C is not a temperature you want to hold on to all the time, let along 70... esp considering metal has much higher heat capacity than, say air. if you have a hard time to picture this... think about in winter, if you hold a piece of wood, it's probably not too bad, but if you hold a piece of metal, it's gonna feel much colder, again, because metal has very high thermal conductivity, much more than wood...
this is why mbp Seems to be hotter than mb and other PC laptops that are made out of plastic