Great idea from Brian Armstrong of Coinbase:
1/ Seems like there should be a standard protocol for machines to negotiate bitcoin payments for resources.
2/ Examples could be getting access to wifi hot spots, your car finding charging stations, mesh networks (net taker/giver).
3/ Devices could be like vending machines, you drop them out somewhere, and they generate rent for providing resources to passing machines.
4/ Sample protocol (a) i need X, anyone have it? (b) I have X for sale at Y (c) I accept, payment embedded (d) I reject, stop pinging me