The credit card rewards battle is heating up as Discover launches two new reward cards into the marketplace. Discover says its new “Gasoline Card” and “Miles Card” are forerunners of a series of new reward cards planned for the U.S. market. The “Gasoline Card” earns cardholders up to a 5% “Cashback Bonus” award on their gas purchases and up to 1% on their other purchases. Then, cardholders have the opportunity to increase their entire award, up to 10%, by exchanging their award for certificates from 25 “Cashback Bonus Partners.” The “Gasoline Card” is the first card to be launched in the new series of “Discover Platinum Cashback Bonus Plus Cards,” offering rewards up to 10%. The new “Miles Card” awards cardholders one mile for every dollar they spend. This new product allows cardholders to redeem their miles for travel on any major domestic airline with no restrictive blackout dates. In addition to redeeming miles for travel, redemption begins with as little as 2,500 miles for other reward options including hotel stays, car rentals, vacation packages, brand-name merchandise, and gift certificates as well as cash rewards. For more information: http://www.discovercard.com.