The FreedomPop iPod touch 4G Sleeve snaps onto any fourth generation iPod touch, enabling a seamless connection to FreedomPop's free high-speed 4G network and allowing the iPod to function like an iPhone.

ENGADGET: FreedomPop ships its 4G-enabling iPod touch case, lets us nearly go phoneless for $99 (update: plan clarifications)

The confluence of mobile infotainment and cars is in its early days, and the ability to maintain a seamless Internet connection over today's wireless networks isn't guaranteed.

WSJ: Mobile Hot Spots: Web Radio, Apps Move to the Dashboard