Smule has released Zephyr, a tool for “unlimited self-expression” for
the iPhone. It’s available at the Apple App Store for US$0.99.

With this app, users can express thoughts by writing or drawing on a
snow covered screen. Zephyr senses every touch and tilt to
supplement each message with a wind sound. Gently composed writing
might be accompanied by the sound of a lightly blowing
breeze. Quickly drawn designs might generate the sound of blustery

If a recipient likes a particular message, he or she can express
“love” by tapping on a heart icon. A message that is “loved” will
get passed on to another recipient.