Today Apple released an update for the wireless keyboard…
About Aluminum Keyboard Firmware Update 1.1
This firmware update improves battery performance of the 2007 aluminum Apple Wireless Keyboard when used in combination with other bluetooth devices (eg. Magic Mouse, some bluetooth headsets) and addresses an issue with the 2007 aluminum Apple Keyboard and the 2007 aluminum Apple Wireless Keyboard where a key may repeat unexpectedly while typing.
Click the Lock Icon, enter your Password and let the software do is thing.
This could take a while!