I purchased my Macbook in August, but I am getting kind of annoyed with the CPU whine and shorter battery life (lasts around 3.5 hours instead of 4.5 like my old one before I got it exchanged, but Apple of course can't find anything wrong), so I was thinking of selling it at getting the newer 2.2ghz. Is there anywhere that lists the feature differences between the two? According to the CNET review, the processor is faster and also uses the new Santa Rose platform (what is that?), and it resulted in almost an hour extra of battery life in their DVD Playback tests. I also noticed that the maximum RAM is 4gb now instead of 2gb. What other changes can I expect aside from Leopard and iLife 08? Thanks in advance!