Monday was made even more special by learning a hard, hard lesson as I experienced my first serious betrayal by an Apple product.
When I started up my shiny new Air to prepare for a presentation the next day, I I found myself caught in a reboot loop. I'd get the grey screen and spinner for a few seconds, then it would stop, go dark again, then back to the grey screen and spinner again. I booted into the recovery mode (hold down Command-R while booting) and to my horror discovered that the FileVault-encrypted filesystem was unrecoverably corrupt.
Attempts to reinstall efficiently while in the office failed, as my bootable Lion install stick apparently doesn't have some driver kung-fu that the Air demands, and my friend Cory's Lion stick wasn't even bootable. I next gave up on the network reinstall when it estimated that it would need over 667 hours to download what it needed. Fortunately, the bandwidth at home is mine (all mine, muahahahaha!!) so it didn't take too long to restore once I got home. I'm also lucky that, as new as it was, it really didn't have anything critical on it; I'd mostly been storing documents out on Dropbox, so getting it back in shape was mostly just a matter of downloading and reinstalling things.
I think what killed it was leaving it asleep for several weeks, until the battery was completely flat, and that the filesystem never got put away cleanly when the charge completely expired.
So--don't do that.