Visit our sponsor.
Some well explained ideas about electronic money, with some interesting essays on the subject that range from "intelligent layman" to full mathematical treatise, according to your taste. Digicash is now live with both fake money and real greenbacks. If you are a student looking for prime sources, this site is the place to go.
US company acting as a central sales point for anyone with "bits" to sell. If they have something you want to buy, all you need is a credit card.
LETS, Local Enterprise Trading Systems
If you can't make money with money, make it with acorns.
This is one of the candidates for Ecash, and you can read all about it at their site. Warning though, the site is an artistic masterpiece and they are no doubt very proud of all the graphical bitmapped buttons, so this is best visited when time, and someone elses phone bill, hangs heavy.
Network Payment Systems and Digital Cash
A top notch overview of the various payment systems under discussion which has been put together by Trinity College, Dublin.