Animal Balloon Font
An app for iPod, iPhone and iPad, "Font Animals" is a balloon animal font that allows you to send customized messages from any of the aforementioned devices. Available on iTunes for $2.49: "With the SHAKE mode, you can shake ANIMAL FONT to create harmonious sound. You can also drag, throw, and pop ANIMAL FONT with your finger..."
(P.S. All proceeds for the next six months go to Red Cross to help Japan)