BlackBerry. Once upon a time the name was proud and the devices coveted. Oh, how far the mighty have fallen. The remnants of what was once a dominant player in a smartphone business it essentially helped create are now being acquired by a private consortium for a fraction of what the company was worth just a couple of years ago. Let's take a closer look at how BlackBerry managed to plummet so far, so quickly, and what can other businesses learn from BlackBerry's mistakes.