I saw this first on this post: http://elliotth.blogspot.com/2009/03/apple-keyboard.html
Apple has introduced a new keyboard that has a cable and does not have the numeric keypad, making it much smaller than the already existing one with keypad. Actually as it does not need the battery casing, it is even smaller than the wireless one (see e.g. http://www.apple.com/keyboard/ ) and http://store.apple.com/de/product/MB869?mco=NDE4NDE5NQ for the new one in the German Apple store.
And you can immediately see that this is a real Apple product, as it is the same price as the one with keypad :-/