These Firmware Updates are avalaible via Software Update and also as standalone installers

"MacNN reports that the thin design of Apple's MacBook Air is causing some confusion for the technically ignorant, according to one blogger who says that the ultra-portable caused him to miss his flight. When going through the Transportation Security Administration (TSA) airport security checkpoint, blogger Michael Nygard was held up as security staff gathered around his MacBook Air, trying to make sense of the slender laptop/notebook. One of the less technically knowledgeable staff points out the lack of standard features as cause for alarm..."