This is a topic that I just started to think about. In the Atlanta area we are currently waiting in long lines for that crap we need to get to work. Now, I could ride my bicycle and might do that a few days this week.... I sure would like an alternative fuel! We are waiting for a diesel SUV to hit the market and do biodiesel BUT, if I could also free myself by converting my Z restoration to CNG. In the future I hope to be driving an electric commuter, a biodiesel SUV and a CNG Z!