PowerPage notes that the new MacBook Air lacks a Kensington Security Slot which is used to secure laptops down.
One of the little issues that seems to have flown under the radar since Macworld Expo last week is that the MacBook Air doesn't ship with a security slot. That's right, the popular Kensington Security Slot (which has been present on every previous PowerBook to date) has vanished from the MacBook Air.