Wolfram Alpha: Asking the right questions

Great article on Wolfram Alpha in Tech Review. Compelling quote:
"It would be great if the Semantic Web had happened and we could just go and pick up data and it would all fit beautifully together. It hasn't happened."
Semantic Web

Dead Reckoning Navigation

Family friend Don is a pioneer in the mapping industry. He recently got an ETAK system up and running again. It used dead reckoning from a car's wheels to map streets!