Was doing some surfing this weekend, looking for some sustainable transportation for my next trip out to California...when I ran across this site: http://simplyhybrid.com [1]

From the site:

Go green With Simply Hybrid.

Global warming, an increasing dependence on oil, and a greater sense of the environment are issues that are swirling around a lot of people’s heads these days. But oftentimes we’re not sure of how to become a part of the solution.By renting a hybrid vehicle you can be part of the solution. Simply Hybrid offers a great line of pure hybrid vehicles all designed to impact the environment less and ensure a satisfying driving experience.

If our environmental worries were caused by an industrial revolution, it's time for us to take part in a technical revolution and start working to save our environment. So what are you waiting for? There’s never been a better time to go green.

A Little About Simply Hybrid

Inspired by camping trips and the environment, Simply Hybrid was launched to create a car rental option for people looking to leave less of a environmental footprint.

They don't have a lot of mileage facts or savings to the planet, in terms of info on the site, but they do seem to have a decent selection of hybrids for any of your needs.