Practical cargo electric bicycles for around town errand running

Cargo bicycles can easily handle around town trip like grocery (or other) shopping, taking boxed to UPS, taking kids to school, etc. They are a very low impact way to get around. Adding an electric motor to a bicycle makes it more practical. Plus at gets one outdoors and is modest exercise. Very cool.

http://www.youtube.com/watch?v=hEaodyWwy1s