I'm getting a 12" Powerbook sometime next week, and I'm slightly concerned about the heat issue (although I'm not really peeved by it... yet). I was thinking of getting a Coolpad, but that's approx another $30 I don't really have to spend. Does anybody have experience with those? And also, there are pads w/ built in fans, etc, and I'm wondering if those are effective. For the cheap, I've read somewhere (perhaps here) that someone was using a marble tile as a heatsink. I'm open to any suggestions, especially if they don't empty my wallet. Thanks!