What are the chances of a coming macbook update? I know I have read the buyers guide, and then DID just come out, but it seems that some people are having delays and reporting that a revision might be in the works. Anything that one gets might have problems, and would certainly be replaceable under applecare, but things like an 80GB drive, or 1GB RAM standard would push me over the edge. I was thinking about buying now, but of course am hesitant. thoughts?