Well, these days the reasons for staying with Blackberry are getting slimmer and slimmer. In corporate situations forwarding around documents in emails does tend to be a pretty big use case. We really need "pass by reference" in emails but no one has really cracked the "dropbox for enterprises" use case. Nomadesk is supposed to be that and so far seems pretty buggy (the "lose your files" kind of buggy). Maybe the aerofs guys will fix that.