Angie, you don't have to post this because I mentioned it on the forum already, but here it is just in case:
I caught a radio interview with fashion designer and biologist Anke Domaske the other day talking about her fashion designs, which are made from a fabric that she and her team designed that is primarily composed of a protein from sour milk. (Apparently, the finished product has a texture/feel very similar to silk. It looks beautiful from what I can see from the video.) What a fascinating concept!
Here's a video and article that talk a bit more about it:
http://dvice.com/archives/2011.....es-a-1.php