Griffin in all seriousness actually makes a Cork iPhone case (has polycarbonate inner shell). I would not stick my iPhone in one of those, but hey maybe you want to. It's a good thing that Think Computers published a review of this iPhone case today.

Quote from the review: "Griffin makes all kinds of products for iPods and the iPhone. An iPhone is quite an investment for most people, usually people do not spend more than $150 on a phone. I have seen so many people drop phones and have them break. I'm pretty sure if you bought a brand new $400 iPhone and dropped it you would be very upset, so why not protect your phone with a case. So many iPhone cases are the same but the Elan Form Cork case offers something different and unique."
Read the full review on ThinkComputers.