The US Department of Homeland Security is warning government types travelling internationally that their electronic devices may be subject to seizure or intereception. Oh noes! Imagine such a threat to privacy and security!
Thank goodness they've provided some tips on how to avoid the prying eyes of oppressive governments. Of course, these tips weren't provided to the unwashed masses, but wikileaks has a copy of the "FOR OFFICIAL USE ONLY" document. See: US DHS: Foreign Travel Threat Assessment: Electronic Communications Vulnerabilities 2008 - Wikileaks.
I suggest reading it before travelilng into, out of, through, around or over the United States. Or any other intrusive country.