If you're looking for some seriously mind-blowing hard science fiction online this afternoon, look no further than a new (free online) short story, "Engineers' Dreams," by science historian George Dyson.

George is known for his meticulous, entertaining historical investigations into secret government science projects of the twentieth century. Now he's turned his eyes to the twenty-first century, and has written a highly-informed and brainy tale of how Google could become the first true artificial intelligence

I've heard many webbish futurists speculate that A.I. is going to come from search algorithms and user-generated content, but this is the first time I've ever seen anybody explain it in a plausible way. Excellent read.