Chase Freedom Credit Card will give you $250 free for signing up after you make your first purchase.
UPDATE 05/01/2007 :: Looks like the $250 deal is dead, but the Chase Freedom Credit Card still pays you 3% cashback on Gas, Groceries and Fast Food!

This is a great credit card because it offers:

3% cashback [...]

There is a new deal out from Citi for their American Airlines AAdvantage card.
There is a annual fee on this card, but it is waived for the first year.
Alternatively, the airline ticket deal for the Citi PremierPass is still going on. This deal isn’t restricted to American Airlines, but you have to spend $500 on [...]

Chase bank has a BP gas credit card that gives 10% off gas at BP pump locations.

-10% rebates on all BP location purchases
-4% rebates on all eligible travel and dining purchases
-2% rebates on all other eligible purchases
-5% rebates on all BP location purchases
-2% rebates on all eligible travel and dining purchases
-1% rebates on all other [...]