A very nice essay by Clay Shirky: Gin, Television, and Social Surplus .
It leads to the thought, just as we wasted time with Gin and TV, we also waste enormous resources while traveling that could be more productive (both personally and socially) in many other ways. Car radios, Ipods, cell phones, in-car computers help, but only go so far if we are still required to drive. (or are confined as a passenger in a system requiring frequent transfers or without adequate space). This is one reason why the DARPA urban challenge is potentially so important (in terms of leading to a fundamental change in how society operates), affecting how we spend 90 minutes a day.