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Users of the Zipcar car-sharing service will soon have a new spectrum of content to enhance their metropolitian rush-hour crawls. XM Satellite Radio will install and activate XM's equipment on Zipcar's entire fleet of 500 cars in 21 cities around metro Boston, New York, and Washington, D.C. Last month, XM cut a deal with Hyundai to provide its radios in all Hyundai models as standard equipment.

XM Partners with Car-Sharing Company Zipcar [Reuters]

Starting in 2006, XM Radio to Be Standard on all Hyundai Cars [internal]

Car Pundit Reviews Zipcar [internal]