Apple posted a pair of updates on Tuesday afternoon. The first is the Compatibility Update for QuickTime 7.2 and the second is for the new thin, aluminum keyboard.
The Compatibility Update for QuickTime 7.2 is described as delivering increased compatibility with iLife. It is about 18 MB (Intel).
The Keyboard Software Update 1.2 allows the user to "take advantage of your aluminum Apple Keyboardis special features," according to Apple. It is about 35 MB (Intel).