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this is completely amazing and a great proof of concept -- there is so much that could be built on top of this

A while ago I was toying with the idea of making a BitCoin<->SBUX automated exchanger for fun, since card transactions are free and could be automated relatively easily. Never did get around to it. Also, there's a rather large scammy underside to BitCoin that would probably arbitrage the hell out of it.

Arbitrage with BitCoin? Surely you joke!

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