BlackBerrys can be quite useful for staying in touch, sending media, and even sending business related files. People might want to draw the line at sensitive government data:
"We're not at war with France, at least not the last time I checked, but that doesn't mean that the French want their state secrets coursing through the U.S. telecommunications infrastructure, courtesy of French government officials addicted to les BlackBerrys. Sure, BlackBerrys come with built-in encryption, but is that enough when you really, really don't want anyone to get their hands on the information you're carrying around?"
While BlackBerrys do have encryption, it might not be up to the task of protecting sensitive government data. It just goes to show that security holes can always be caused by people who don't properly understand the underlying technologies and problems.