Check out these wedding bands by Sakurako Shimizu. They are molded into a waveform representation of your partner's voice recorded saying "I do," or any phrase you choose. A very cool and unorthodox idea!
Melissa says: "Even the sonic screwdriver couldn't make my ring more gorgeous! My photographer Heidi Caldwell was awesome in incorporating our Star Wars and Doctor Who themed wedding." It's just a good thing they aren't made of wood!