Research In Motion’s BlackBerry line has a long history of being the go-to smartphone for the business crowd. By and large, the BlackBerry hasn’t changed much over the years, sticking to its vertical form factor, full QWERTY keypad and generally small screen. Those attributes, along with a few nice extras, are all present on the company’s latest slice of fruit, the BlackBerry Curve 8520. The sleekest BlackBerry yet is destined to launch on T-Mobile USA, and while the specs list is decent, it’s still being classified