In Wired: The Rise and Fall of Bitcoin. A detailed history of this digital currency concept. An interesting but sometimes mysterious idea, that I thought was perilous at the time and I have seen little about since its emergence on '08. Another opportunity for criminals. Not really a complete fall yet. See the Bitcoin site. More on the Wikipedia site. There are a number of other sites promoting the idea.
" ... Bitcoin is an experimental new digital currency that enables instant payments to anyone, anywhere in the world. Bitcoin uses peer-to-peer technology to operate with no central authority: managing transactions and issuing money are carried out collectively by the network. Bitcoin is also the name of the open source software which enables the use of this currency.... "