Jackal has been hard at work on an analysis of the frequent renter programs all the major rental companies. So far we've got Dollar Express, Thrifty Blue Chip, and Enterprise Plus posted to the site. National Emerald and Hertz #1 Club will be coming very shortly. Check them all out and see what you think. We don't have the ability for people to comment on our site yet, so we'd love to get feedback here, especially from those of you who have lots of experience with the various programs. AutoSlash.com We automatically slash your rental rates!