suraj.sun sends this quote from Engadget about U-verse subscribers soon gaining the ability to use an Xbox 360 as a set-top box:
"A so-called Wired Release will roll out to AT&T U-verse customers next Sunday, and it'll bring the long awaited feature with it (though you'll have to wait until November 7th for that particular aspect). This means an AT&T U-verse customer's Xbox 360 will have a Dashboard app, and when launched, it'll let it function exactly like any other U-verse set-top. The only major catch is that it can't be the only set-top — you'll need at least one DVR at another TV in the house to enjoy one of the four HD streams that could be funneled into your home."