I just downloaded an internal CPU temperature display thing-y and my iBook is currently operating at 45.5-51C and I'm just wondering how hot do these things get? Cuz that sounds pretty hot, and my fan hasn't even come on. Does the built-in fan really do much to cool it down? I always stick my iBook on my window ledge when the fan comes on, because being winter and all it's usually freezing cold there and it cools the iBook right down and the fan shuts off after a couple of minutes. Lastly, short of buying a laptop stand, do you guys use any other methods to keep your iBook/Powerbook nice and cool? Like an ice-pack underneath it or something? I'm often using my iBook on my bed or on my lap, so it gets kinda hot sitting on the blanket.. I guess I just worry about my little baby I don't want it to wear out from overheating or something.. Am I worrying TOO much? Thanks!