Every quarter is pivotal for BlackBerry right now, but the one covered by today's earnings report (Q1 2014, in fiscal terms) is especially important. It's the first full period of Z10 availability and also the first quarter to cover significant Q10 shipments to markets like Canada and the UK (although not the US). So far, the news looks mixed: revenues are up to $3.1 billion, compared to $2.8 billion generated in the sam
