T-Mobile has HotSpot @Home, Sprint has AIRAVE, and Verizon has its Wireless Network Extender, leaving just AT&T among the States' big four carriers without a launched WiFi or femtocell solution for extending signals into the home -- but it looks like that's finally getting close to changing. We know that they've been in the process of trialing some units recently, and tipsters have observed that there's now a pretty sli
