For now, I am just going to gather links to good info on Bluetooth. It's a pretty engineering-focused thing, so don't expect deep UX stuff here.
BLE Bluetooth Low Energy. Really interesting stuff. An M2M standard that is actually just being used as Bluetooth mark 2. Do not design for Bluetooth and assume low energy. Much different system which can be taken advantage of in interesting ways. Advertising for example, is very neat (and not about advertising).
BT Antenna Implementation. Not so much antenna design as designing PCBs, circuits, mounting, and positioning of existing BT antennas. Some odd behavior of some antennas makes this a non-trivial task.
Next: Drawing Tools & Templates
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