Architects Jun Inokuma and Yuri Naruse have revamped the Post-It note. Their version takes wood waste from houses, turns it into paper, and forms it into a sticky stack of notes shaped like little houses! As Core77 says, "this is a great design project because a) it incorporates recycling, b) it's a useful product, and c) the design addresses and corrects the flaws of earlier generations of the same product."
And unlike the traditional mess of neon squares, this design is so pretty!
Unfortunately, these don't seem to be in production yet, but you can read more about the designers at their website (translation needed).