It was an issue widely covered in the press, or at least widely covered enough that I remember people joking about it in monologues. Obama wanted to keep his blackberry and other gadgets in opposition to what the Secret Service wanted. They finally compromised with security-enhanced versions of the devices such as his so-called "Blackberry One" a pun off of Air Force One.
Though I didn't hear anything about securing it when he got an iPad, I did see photos in the news of him carrying one. I would assume it would be equally vetted and locked down.
