Apple Wireless Keyboard
Click Here to Buy It Now from Apple, $69
If you use a MacBook or work on a new-ish iMac you should already be familiar with the feel of the Apple Wireless Keyboard. Thin, sturdy, and industrially beautiful, Apple's bluetooth keyboard can be the perfect accessory for your iPad. All you need to do is dock your iPad with the Apple iPad stand (or Incase's awesome Origami Workstation) and go to work. The only downside with this keyboard is that it's a bit heavy, making it one of the least portable keyboards on this list.