You Apple apologists need to remember one thing: this is a brand new product that cost $1500 yet worked for only one month. By any measure that is inexcusable! The company should be falling over itself and bending over backwards to ensure my (or anyone else's) satisfaction.
This is not an isolated problem. Many people have experienced it and many more have written about it online. I am certain Apple knows about it though they have yet to publicly acknowledge it as they have the discoloration issue one white macbooks.
Based on what I've been reading I'm fairly certain this is some sort of logic board problem in the initial runs of macbook. I'm also fairly certain they will simply send me a new machine.
Here's what they should have done when I came into the store the second time: apologize, test the mac for software glitches, viruses, etc. offer to swap my bum machine for a new one (same ram & HD configuation) and offer to clone the data from the old drive to the new one. Apologize again.
Ideally, they would give me a new Nano for my toruble since they are now giving them away. Had I waited to buy one more week, I would have gotton a free Nano and probably a macbook that wasn't DOA.