The long and tedious Micropayment Smart Codes: New Online Payment System... can be applied to quite a few things.
Codes are assigned 'payment types' (my term) whereby the code is only good for a certain kind of payment.
The system is quite flawed, I believe, but on the right track. The internet needs a good solution to the micropayment problem. Providing metadata and other properties to payments (or tags, for all of you Flickr and Folksonomic heads) is the future. Money is become more and more abstract, like data, so there's a tremendous amount of flexibility here that hasn't even begun to be exploited.
link via SmartMobs.
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