When Eye-Fi first launched its wireless SD cards back in 2006, most of us weren't carrying smartphones, much less tablets. At the time, the idea was to send your photos straight from your camera to your PC, where you could run slideshows or upload them to the cloud (if you were already into that sort of thing). Lately, though, Eye-Fi has been forced to rethink its product: the company just announced the Mobi, a $50
