While i'm in the process of stealing things from Joel on Software, allow me to mention: Creo Tokens. This is an amazing idea for seamlessly allowing people to transfer files, either using a server or directly peer-to-peer, and Tokens are surely one of the nicest implementations for truly decentralized sharing I've ever seen. Either this company will be huge, or Kazaa will implement the exact same technology and give it away for free. Either way, expect to be doing something very much like this in the very near future to send around your latest Power Point.