Supply chain is one that I'm surprised hasn't taken off more than it has. There's a chain called Waltonchain that intrigues me. The idea is to attach little RFID (radio frequency ID) tags/stickers to items. Apparently they're very cheap, like 5 cents USD. Then as a product moves along a supply chain, they are automatically scanned in. No need to physically scan bar codes. Seems it might have changed since last I looked at it though.
!LUV