Up until now, T-Mobile was the only major U.S. mobile carrier to allow Android Market purchases to be paid for via direct carrier billing. Well move over guys, AT&T is now allowing direct carrier billing as well through their latest Android Market update.
That's right AT&T fans, no more Google Checkout needed for your app purchases. There's a 15 minute window where you can get a refund on a purchase without it hitting your bill. Not only can you pay via your bill, you'll also notice new categories in the Android Market like "Media & Video," "Music & Audio," "Business," and "Sports" among others.