Wal-Mart is waiting for your check.

The world's largest retailer, which made $819,976 in sales every minute during the fourth quarter of its 2007 fiscal year, is expecting to see you walk through its doors with an IRS rebate check in your hands. But there is a more patriotic thing you can do.

Beginning this May, the U.S. Treasury will start sending "economic stimulus payments" to more than 130 million Americans. The vast...