Best Cashback Cards:

Personal (As stated above):
Chase Cashback 5% (Great if you can get the $50 signup) $300 Annual Cap
Citibank Dividend Platinum MC 5% Cashback $300 Annual Cap

Small Business (Don't report debt on your personal credit report!):
Advanta Platinum MC 5% Cashback $300 Annual Cap, Primary Rental Ins
Costco Amex Cashback (3% Dining, 2% Travel, 1% Etc) No Annual Cap

All have no annual fees. Advanta has a fixed rate 7.99% Purchases with 0% for 1 yr on Balance Transfers.

For some people, cashback is a better way to go than miles/points.