Mac Book becomes very hot within munutes (67 C- 72 C)

I recently got a new macbook. It looks cool and all but got a big problem.
The notebook becomes very hot within minutes of usage.
I have downloaded the cpu temperature measurement utility and
got these readings.
a) 15 minutes of usage (67 Degree Centigrade, hot enought to
melt wax)
b) 30 minutes of usage (72 Degree centigrade)
After googling this topic, I see that many of the users of macbook are facing the same problem. Does apple intend to do
anything about this problem.
I have used sony vaio and dell in the past.
Never noticed any
heating problems with them.
macbook   Mac OS X (10.4.4)   New

That's about the range I see for normal usage with a browser, mail, and itunes open. You must take into consideration the current room temperature. I've seen screenshots of MacBooks running up to 5 apps with temp is the 50s while others - like you and me - have temperatures in the high 60s low 70s.

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