ForgedArtificer writes "At their recent developers conference in San Diego, CA, PayPal unveiled a proof-of-concept gumball machine that would instantly pay for a gumball through a PayPal account using a smart phone and a QR code, sending a confirmation of the purchase through Twitter. Ok, maybe we all don't really care if we can get a gumball without a quarter, but the possibilities for this technology are endless."
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