Zune Paint from Sibling Rivalry on Vimeo.
It's a really strange commercial. And it looks really cool until you figure out what's going on. It made me want to buy a Zune less but you know... whatever. What I really like is this remix by Shinichi Osawa of Digitalism's "Pogo". Check it out.
Digitalism-Pogo(Shinichi Osawa Remix)