Discover is doubling its normal bonus rate on grocery store purchases from November 1, 2008 to December 31, 2008 for new accounts:

• Discover Open Road Card: Will earn 2% cash back on the first $1,000 in grocery purchases during November and December. As usual, it will also earn 5% on gas and auto maintenance purchases.
• Discover Motiva Card: Will earn 2% cash back on the first $1,000 in grocery purchases.
• Miles by Discover Card: Will earn double miles on the first $1,000 in grocery purchases, in addition to earning the usual double miles on food and travel, on up to $3,000 per year.