I just read this great article about the President’s BlackBerry and the security risks associated with its use.  It highlights different ways that spies, with simple equipment, can figure out the President’s real-time location.  Needless to say this would be bad.  However, I have to think that the NSA has thought about all of the possibilities already and are likely issuing new devices to all of the President’s staff at least every other day.  Also, I am sure the President does not roam on foreign network providers with his device.