We've heard a lot of stories about Find my iPhone helping people track their lost and stolen iOS devices, but here's one of the first stories involving Photo Stream. It all started late last December at the DFW airport in Texas. Ken McLellan had just arrived home from a business trip. While he reached to pick up his bags, he put down his iPad along with carry-on bag. You probably can guess what happened next. With bags in hand, he turned to pick up his iPad, and it was gone. Like any loyal Apple user, McLellan has an iPhone and an iMac. He's also one of 85 million people using iCloud and had, rather fortuitously, turned on Photo Stream sharin