"Green" was the topic of the second morning session at DEMO
today, with both environmental and economic applications taking
center stage.  Mapflow uses an iPhone and its GPS capabilities
to let people share rides along a similar route. You enter your
route on its Avego .action web site, and it then finds other
people who want rides on that route. It includes a "meter" for
sharing costs (using a pincode system), ratings of drivers and
passengers, etc. It's an interesting idea - and certainly more
ride-sharing would be more efficient. But I'm not sure how many
people will really do this.  Microstaq has a MEMS-based chip it
says will reduce the energy needed to run air-conditioning
systems by 20-25 percent. The Ventilum chip works in a special
valve that replaces mechanical valves and solenoids in AC
systems. It says its valve will be much more efficient. This
isn't really my area these days, but it certainly sounds great.
Rudder is a financial web site that collects information from
your banking accounts, show