I mentioned canbus because it is the parent of many derived systems that focus on aerospace, industrial automation, safety devices, etc. despite being itself developed for ground vehicles and focused on basic functionality. It is also based on a cool physical layer implementation of arbitration with open transistor collectors that preserves message priorities in bounded time and seems like a step above ethernet in that regard. Canbus lan-ethernet wan gateway anyone?
I think we would do well to try out a few different busses and come up a list of subsystems that would best run on each bus. There are Dallas 1-wire and I2C 2-wire busses, CANbus for ground vehicles http://en.wikipedia.org/wiki/CAN_bus, 1553 for aircraft and spacecraft http://en.wikipedia.org/wiki/MIL-STD-1553, and I'd be very interested in learning what type of bus is used for building and industrial automation. Any others? I would bet the CANbus arduino library is out there somewhere ...wait...http://arduino.cc/forum/index.php?topic=8626.0 BOOM ...LCD gauge cluster anyone?
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