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what temperature does the MBP reach (in F)? I have a PowerBook and it gets to 145 F and I think that is too hot.

I'm interested in how hot MBAs and MBs get as I too am in the market for a new mac laptop.

My 1st generation MacBook Pro was definitely too hot to use on one's lap. But, I've seen reviews that said the 2nd generation one ran a lot cooler (due to the 65nm Merym Intel chip), and now the latest generation is said to run even cooler than that, due to the cooler, 45nm Penryn chip.

Also, it's worth noting that all of Apple's laptops run extremely cool to the touch when the fans are running. If it's an issue for you, you can download smcFanControl (http://www.macupdate.com/info.php/id/23049) and manually turn up your fan speed a bit. This will make even the MBPro _cold_ to the touch.

Off topic a bit, but conversely, I opened up my MBP and reapplied the thermal paste on the processors. It was a mess when I first opened it up, and that was causing the heatsink to not accurately pick up temperatures, ultimately causing the fans to never turn on. I was hesitant to use a software solution when it was a hardware issue.

Then again, it was risky because if the MBP didn't boot after I reapplied the thermal paste, I would have a very expensive paper weight on my hands!

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