In addition to Fortune's 40 Under 40 list, we're also keeping our eye on these 20 innovators, young guns from a wide range of industries and backgrounds.
|Debit vs. credit cards: Which is safer to swipe?|
|Katie Couric to end daytime television show|
|BlackBerry's brutal quarter: Sales drop 56%|
|Target: 40 million credit cards compromised|
|U.S. stocks perk up as holiday nears|