I've got a 2Ghz macbook that I'm not very happy with. I'm rather curious about the new Penryn macbooks in regards to a couple areas. I'm less than pleased with my keyboard and with the heat that this thing puts out. It is my understanding that the new MB's use less power. I searched for a review that would show how much less or how warm they got. I wasn't able to find anything. My keyboard has a jangly rattle when I use it. The keyboard just feels really cheap. I got rid of an ibook g4 to get the macbook. I think the ibook had a more tactile feel to the keys and seemed to have more 'spring'. Has anyone had any first hand experience with these two machines side by side? I'd love to hear any first hand comparisons. Thanks.