Obama may get his wish to continue using his blackberry, at least partially. Here is a video on a secure PDA Blackberry-type device that he could use.
[youtube=http://www.youtube.com/watch?v=3-41dlyceCg&rel=0&border=1&color1=0xe8e8e8&color2=0xe8e8e8&feature=player_embedded&fs=1]