Sorry for bringing up such an old thread, but I thought it would be rather pointless to open a new thread that has the same name as this one.
I own a Hp G72 laptop with an i3-330M, but unless I'm putting books under back side, it overheats every time I play a game or use a cpu-intensive program. But even in that position, where the bottom side is free (5-10cm distance to the table) several programs show about 70-90°C (from more or less idle to gaming).
Is that normal? I can't imagine it is, but I can hardly open my laptop to see if anything is blocking air circulation or something like that...