BlackBerry fans waiting for an opportunity to blend the BlackBerry 10 OS with a more familiar QWERTY formfactor may know exactly how long they have left, at least north of the border. Mobile Syrup received this pic tonight of what is purported to be an internal Rogers document, which lists the launch date for the BlackBerry Q10 as April 30th. A few other phones appear on the list as well, revealing the Canadian carrier will be offering the Nokia Lumia 520 and a couple of Doro's PhoneEasy models. If this date holds up it's a lot more specific than what we'd heard