Now Playing: 07-05-12 Marketplace Tech Report

When you're running around town and want to check email on your smartphone, you connect to a data network through a nearby tower run by your carrier. But what if we connected with each other instead? My phone was your tower, your phone was someone else's? That's the idea of mesh networks, and it could catch on soon, especially in the case of emergencies. Plus, public shaming online through and @NeedADebitCard.