I like free content very much. Still... maybe we already have micropayments, but they aren't evenly distributed yet.

The current generation of gaming consoles does something close to micropayments and scrip at the same time, through their online shopping points. They solve the transaction cost problem by making you buy $20 worth of points at a time (I bought 15 Nintendo points for World of Goo, and then blew the change on an impulse buy - a copy of Opera). Points also solve the resistance problem, by having a captive audience of users who want what they offer.

The next step might be to allow game review sites to accept Nintendo/Sony/XBox points for access to content, demos, trailers, etc. At the same time, that would tie them more closely to the console manufacturers. More mainstream channels could follow as they see fit.