And the iPhone and iPod Touch move one step closer to becoming the "mother of all universal remotes…"
Canon's Easy-PhotoPrint for iPhone allows you to send any picture on your iDevice to a compatible PIXMA printer via Wi-Fi. (Right now, "compatible printers" means only the models MP990, MP640, and the MP560 all-in-one; no word on if or when Canon will add other models to the pool.) As you can see from the screenshot, it's ridiculously easy to select the paper size and type, and whether or not you want borders on the final print. The app automatically finds the printer on a wireless network, and even interfaces with the iDevice camera to print as you shoot.
[Available for free from iTunes]