When I first read about this I thought, cool AT&T has found a way to boost their crappy signal in my house with the 3G Microcell. Then I read the details and got a bit angry. So AT&T's signal is weak and instead of fixing the issue, they want me to spend $150 and send the call over my broadband connection (which I also have to pay for). It gets better, on top of all of this added cost for me, the customer, the calls that go over my network also eat my cell plan minutes. Not to mention my neighbor will benefit from this at the cost of my network bandwidth. Boo.
Way to push the problem straight to your customers pocket book ATT.