http://mashable.com/2012/03/29/rim-refocus-enterprise/
And to those who are still trying to defend the PlayBook... this statement alone pretty much sums up its failure:
"RIM sold about 500,000 PlayBook tablets last quarter, or about the same number of iPads Apple sold in the first 12 hours after the launch of the new model. Heins remained bullish on the tablet, though, saying RIM had moved 1 million PlayBooks to date"