I interviewed one of the developers behind Bitcoin for ReadWriteWeb:
Bitcoin is an open source, peer-to-peer electronic currency created by Satoshi Nakamoto and maintained by a small team of developers. As part of what’s turning into an ongoing series on the distributed Web, I talked to contributor Gavin Andresen about how the software works. This is a technical overview. If you’re interested in an economic or political look at the software, you can read the Wikipedia entry or Niklas Blanchard’s essay on the project.
See also: The New Currency War