The W3C has been working on the issue of micropayments for some time now. [Micropayments are *usually* defined as low-cost payments for viewing content which are currently impractical due to the transaction costs exceeding the payment] You can find the W3C site's information on micropayments at:
http://www.w3.org/ECommerce/Micropayments/#About
the currently proposed standard is at:
http://www.w3.org/TR/WD-Micropayment-Markup/
Now IMO these tools will probably go mainstream in a year. The collapse of advertising revenue based content models for web sites will serve to hasten this process.
However some people believe that micropayments are never going to happen:
http://www.openp2p.com/pub/a/p2p/2000/12/19/micropayments.html http://www.cisp.org/imp/april_99/04_99crocker.htm
There is useful debate here
http://www.business2.com/content/magazine/indepth/1999/03/01/11654
which can be summarised as: it will work when MS ships it as part of IE.
Ian Cooper
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