Now through July 31, 2009, get 500 Amtrak Guest Rewards bonus points and a $50 free driving credit when you join Zipcar.Imagine a car right outside your door that can be yours at a moment's notice for a few hours or the entire day. Imagine a Zipcard that's your key to thousands of cars worldwide, including hundreds right here in the Bay Area. Imagine saving more than $500/month and still getting to enjoy all the benefits of having a car, plus bonus points added to your account. With Zipcar you have access to hybrids, MINIs, pickup trucks and more. All with gas, insurance and 180 miles per day included. And once you’re registered, you start earning points with every driving dollar you spend. Click here to sign up and enter promotion code ZipAGR2009 when you apply.