Alan Brenner/Alistair Mitchell
It seems cruel to kick Research In Motion when it's been down for so long now, but it's tough to ignore the ongoing exodus from the formerly mighty BlackBerry maker's executive ranks. In early April came two more: senior vice president Alan Brenner, and Alistair Mitchell, a vice president for RIM's BlackBerry Messenger service. New CEO Thorsten Heins, who took over beleaguered RIM in January, said more big changes are coming.
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