There's no getting around it: it's been a rough couple of years for Research in Motion. This week's on-time release of its PlayBook 2.0 software marked a rare bright spot in an otherwise grim era, bringing much needed features for the QNX platform such as a unified inbox, deeper social integration and updates to the company's BlackBerry Bridge app.At the same time, the release of the 2.0 software has brought many of our outstanding questions to the fore: why weren't these features present in the first go-round? Why did the company take so long to flesh out its software? And lastly, when wi
