Steve Jobs announced a new line of iPods on Tuesday; but getting almost equal time with his new products - once again - was his health. He looks too thin, and for such a public person, - and one whose existence means so much to so many people - that is something that is just hard to ignore. But if his pancreatic cancer has not returned - and I believe the reports that say it has not - what's wrong? I suspect it's that his digestive system hasn't been the same since his cancer surgery. The operation saved his life, but Google "Whipple Procedure" and you'll see that it's still a ghastly operation. Surgeons not only remove a chunk of the pancreas but a chunk of the stomach and small intestine. Jobs apparently had to have another surgery earlier this year related to that. My former colleague Philip Elmer DeWitt flicked at this on his blog back in June. It appears to need repeating.