AT&T today became the last major US carrier to launch the Samsung Galaxy Tab (link active soon). The Android tablet will share the same seven-inch screen, 1GHz processor, dual cameras and built-in Flash support, although it will follow an iPad-style 3G activation model. Users can sign up for and start 3G service on the device itself and pay only for either 250MB or 2GB of data in a given month when needed.
