AT&T recently announced a $10/mo discount if you combine your postpaid wireless account bill with your AT&T U-verse or DirecTV bill.
There is no change to the terms or billing cycle (so I will still see two bills/charges each month, but are linked on the website, for example).
I could not find how to get the discount added online so I called and the nice lady, after trying to up sell me on a faster internet service, more data for the wireless account, and a 3-free-month offer for Starz, added the $10/mo. There is no expiration as long as I maintain the U-verse account and a Mobile Share Value account. Which for me worked out as the best deal already but is now $120/year cheaper. Took about 10 minutes on the phone.