I am a proponent of full keyboards, but Apple was right in my opinion to bring out the reduced Wireless Keyboard because the vast majority of people prefer to save space to the usability that the number pad gives you.
But if you want to add this keyboard to your Apple Wireless Keyboard without wanting to sell the current one and buy an extended one, you will be able to do it, since Wireless Goodness is preparing this addon with which through Bluetooth you can use a numeric keyboard that is coupled to the Apple keyboard.
The best of all? Which is made exactly the same as Apple's, so it's not out of place at all.
Source | TUAW
