From Everything USB:

I never thought it'd be possible, but Mazda of all companies has embraced the inner geek inside me to make me want to run out and test drive one of their cars. Thankfully this is only a concept car for now, and my Honda is still running strong.

Designed for "net-savvy youngsters", the new concept hatchback, Mazda Sassou, ditches the traditional cylinder lock key system in favor of USB flash drives. In addition to starting the engine, the flash drives can be used to transfer driving directions for long trips along with the latest songs for the day to the Sassou's internal hard drive.

Read more at everythingusb.com

Thanks to Mike for this one.