The best credit cards of 2011 are profiled in this CardRatings.com article
. One of the categories is the best cards for cash back.
The top cash back card went to Fidelity Investment Rewards American Express which offers 2% cash back to your linked account at Fidelity. The other two top cash back credit cards went to Capital One Cash which offers up to 1.5% cash back and Blue Cash Everyday Card from American Express which offers a 1% rebate on all purchases, with double rewards at gas stations and triple rewards at supermarkets.