They already have it in Avis Rent a Car
it will be available for sale soon
"The device that transforms this humdrum domestic into a shining example of go-anywhere, do-anything internet is the Autonet Mobile Wi-Fi router. Currently available only through Avis for $11 per day, the paperback-sized gadget plugs directly into an AC power adapter. Once a security ID number is punched in, the router blazes to life and delivers encrypted Wi-Fi within a 100-foot radius. Suddenly, actions unheard of in an automobile are possible: surfing the internet, syncing GPS or just looking for directions on an iPhone."
http://www.wired.com/gadgets/gadgetr...tmobile_review