Steve Jobs yesterday issued a letter indicating his significant recent weight loss is due to a "hormonal imbalance". This soothed the markets, and AAPL was up about 4% for the day, and right now is trading up another buck and change premarket to about $96. This is all despite the fact that the statement was extremely vague. In this context "hormonal imbalance" could mean all sorts of different things, including even the possibility of a recurrence of his neuroendocrine tumour. (We all of course hope this is not the case.)
Nonetheless, the markets are happy, and I wish Mr. Jobs all the best in his recuperation. Hopefully Phil Schiller will be an effective stand-in for him at Macworld too.