Watch the Digg Stream
Digg (the company) has a created several tools that are the stock ticker tape of its population of Internet taggers. You can a real-time stream of digg topics. The stream is offered in 4 different formats - the stack, the swarm, the arc, and the "bigspy". The first three are the most clever, but the last one is really the most useful.
Imagine yourself sitting and watching what people are reading on the Internet. What could you do with this information?
Digg Labs Real-time Streaming