LINK
Terms from the card webstie as of 7/24/07:
Apply for an ExxonMobil Personal or Business Credit Card by 8/31/07, and for each of the first four billing periods that you make $10 or more in purchases, you will receive a $10 rebate.
Subject to credit approval. Rebates are not applied at the time of purchase - they will appear as an account credit on the same billing statement with your monthly purchases. The total rebate will not exceed $40. The ExxonMobil Personal and Business Credit Cards are issued by Citibank (South Dakota), N.A.