Phil Angell has posted the MacBook Pro Heat Page where he is posting the CPU temperature graphs of contributors MacBook Pros.
Some people have opened their laptops and cleaned off the old Apple thermal grease and replaced it with Arctic Silver 5. A 20 - 30 degree Celsius drop in temperature has been noted in some cases.
Many MacBook Pro owners are so frustrated at Apples apparent silence on this matter that taking the computer apart is the only choice.
It's interesting to compare the temperatures of MacBook Pros before and after removing Apple's thermal grease and the application of Arctic Silver 5. More on the Thermal grease theory can be found here.
You can graph your MacBook Pro's temperature quite easily by downloading a copy of Hardware Monitor and following Phil's instructions. Phil is soliciting temperature graphs from MacBook Pro users that have removed Apple's thermal paste and applied Arctic Silver 5.