The major problem is that RIM is based in Canada. Regardless of how secure their network and devices are, we could never risk having sensitive information leave the country willfully. Although, since the article says the correspondance is in the public record, I can't see where the security threat would arrise from. I would also think the pentagon would be smart enough not to email Top-Secret information to his blackberry in the first place. As long as the NSA records all the correspondance entering and leaving his blackberry, it's still in the public record, and he can have his little toy.
Now, as for the MacBook, there's no way we can risk our national seurity to the whim of Steve Jobs. In the future Jobs will probably decide to roll-out a "feature" that gathers and stores all your perosonal files and information on Apple's servers, you know, because that's what the customers want. Then he defects to China and we're all in a world of hurt. I, for one, would welcome our new Macommunist overlord.