Credit Card Bonus: Southwest Airlines Rapid Rewards Credit Card From Chase

Promotions link: www.mychasecreditcards.com/6000054/Default.aspx

$100 southwestgiftcard once you have made $1,000 in purchases
$150 southwestgiftcard once you reach a total of $2,500 in purchases
$250 southwestgiftcard once you’ve made a total of $5,000 in purchases

Receive 16 Rapid Rewards credits after first use of your card (1 free flight)

$59 annual fee that's waived for the first year

Credit for this find goes to this FW thread and this FlyerTalk thread. It's mentioned that this may be targeted for the Denver market.