Everyone who has read or seen The Order of the Phoenix knows that the Ministry of Magic uses paper airplanes to send inter-office memos (the owl droppings were making a mess),
The Daily Prophet is reporting that some owls are quite peeved about loosing their jobs. In an effort to prevent an owl strike, the Department for the Regulation and Control of Magical Creatures has used transfiguration to create a dropping-free owl/paper airplane hybrid.
Now you can make your very own owl airplane to transmit your super-secret messages. Just don't be suprised if is flies a little more like Pigwidgeon than Hedwig ;)