I've been involved in the building and racing of streamlined recumbent racing vehicles and participated in the World Human Powered Speed Championships in 2003.
My latest project is to offer a motorized velomobile to the masses. It is available in February 2009. Its development is almost complete.
It offers protection from the elements and is designed to cruise in bicycle lanes, not needing license, registration or insurance. I'm already seeing 142 mpg without the vehicle's fairings, so, I'm expecting the mpg to improve a little.
I look forward to responding to more posts. This is a nice forum.