Green Tech: Popular Mechanic's page on Green Cars

Popular Mechanics has a page called Drive Green which has many articles on green automotive technology, alternative fuels, getting the most from your gas, and more. Kudos to them.

Green Resource: Edmunds Green Car Guide

Edmunds is a leading source of information on buying cars, both used and new. They now have this Green Car Guide which gives all sorts of information on the most fuel-efficient cars. Includes information on alternative fuels vehicles. Great site!