You should be able to view your usage from the myAT&T app which can be downloaded from the market.
Sent from my SCH-I510 using Tapatalk
So the phone doesn't do it natively? It requires an app.
You can get 3G Watchdog and set up a widget on your home screen. It's a free app in the market. It isn't the official count that AT&T goes by, but it gives you a general idea.
Thank you for that tip. I loaded up the app and went to MyATT and got my current data usage along with my billing date, then I went to the menu of 3G Watchdog and entered my quota and my data usage. I put a widget on one of my desktops and set it to warn me at 75% used. Very cool. Thanks again!