Looks like AT&T may be trying to top the customer outrage resulting from its iPhone ordering disaster this week (via Mitch Kapor)
As you recall, AT&T’s MicroCell is being marketed as a way to repair bad connectivity in areas with little or no AT&T reception including, but not limited to, basements, attics, Manhattan, and San Francisco. It essentially piggy backs on your own home network to provide data service and voice to your phone.
However, AT&T will still charge data used while in range of the Micro-Cell against your no longer unlimited data cap. This means that you’re essentially allowing AT&T to drop a cell antenna into your house, paying $150 for the privilege, and they get to use your data infrastructure to get voice and data back to their own fiber networks.