buy a fuel efficient and eco friendly car

This is one of my top goals as an environmentalist i really want to replace my 2007 mazda 3 that gets about 24/32 mpg. Thats good but not good enough! I have a couple solutions that might interest some of you. I have a couple eco auto links to share with you all to help us tackle this goal.
http://www.smartusa.com/
http://zeropollutionmotors.us/

The smart car is a compact vehicle that gets good millage is on the market right now.
The compressed air car from zeropollutionmotors.us is a car being made in Europe and hopefully will be mass produced by 2010. achieves over 100 gas-equivalent mpg and over 90 mph. They look funny, but if it means driving greener and more efficient i’m all for it!
If you guys have any other solutions let me know.

just traded in our Hyundai Elantra for a Honda Fit – smaller, better gas mileage. Still not a hybrid but $8000 US less than the Toy Prius. Will keep saving our $$$$ for the day when a hybrid is more affordable.