They should have stayed with RIM. As dead as they can be, as outdated their OS looks...
It's still the most secure business phone out there.
I manage a hosted exchange with a BES... as much as I hate the complexity of upgrading a user from BIS to BES... (Calling their provider, changing the plan, backup the phone, whipe the phone, activate to bes, user wants data back, remove desktop sync service book, restore data without doing full restore, back to service book, undelete desktop sync...)