Sign up for AT&T Worldnet Service by calling (888) 731-4229 or at http://download.att.net/nwains and watch the WorldPerks miles trickle in. You could eventually see a total of 7,500 miles from this promotion. Two thousand miles are posted six to eight weeks after your credit card has been charged for the first two months. An additional 250 miles will be added each month for the next 22 months. The offer is valid through May 31, 2003.