I'm currently using an iBook G4/1.2 as my primary machine - and I'm pretty happy with it. But my fiancee's G3/500 is flaking out, so she wants me to get a new computer so she can have mine. I'm actually finally in the market for a Pro model - but I've heard that the aluminum casing can literally burn your wrists. I have a home-based business and literally spend most of the day laid back on the couch with my laptop actually on my lap. I thought a 15" screen would be a nice change. Does anyone else use the MBP as their primary machine - and might offer a reality check on how hot they are? And for the gurus - are the MBPs significantly hotter than the MacBooks? I'm really scared of buying a new laptop with all of these horror stories about how hot they get. I work like 12 hours a day on my G4 - it runs very cool for the most part, only getting somewhat uncomfortable after a while under the left palmrest (I think the HD is under there?) I'm not too concerned about the heat coming out of the bottom, as there are numerous solutions to that. But I can't think of a solution to the palm rest area getting stupid hot. And if I can't actually sit around with it on my lap most of the day, I might as well just buy the fiancee a new iMac instead and keep my iBook? Any advice would be greatly appreciated.