I got my Sandisk 2GB U3 drive at Sitex 2006 @ SGD71. This is a real threat of U3 drives, check the hacks available here: http://www.hak5.org/wiki/USB_Hacksaw
Forbes reported, A recent news of data related to U.S underground nuclear weapon tests been leaked from Los Alamo Labs.
The threat of USB and other removable media is real and enterprises should be looking into solutions to protect those endpoints