What have we heard? Well, for starters, they seem to be focused on prepping the network to compensate for unannounced devices and also future devices that will use heavy data. What about tethering options? AT&T has said that changes to current data plans and tethering plans (or availability) will change when the network is able to sufficiently handle the load.
Although vague, this information corroborates reports that the tablet could have 3G network capabilities.