Blackberry or Smartphone?

[ozbon]

Blackberry is more secure than any other device as you can remotely wipe the data.

If you're using Windows Mobile 6 linked to an Exchange server, it also has the security functionality to wipe it completely clear, including data on the memory card.

This piece has more details - I don't use Exchange/Active Directory, so can't comment on that side, but it seems pretty effective...