$100 Gift Card for Citibank Credit Card

Receive 10,000 bonus points redeemable for your choice of a $100 gift card at one of several stores and restaurants when you sign up for a Citi Simplicity Rewards Card and make a purchase with the card within the first 3 months. Refer to the promo page for more details.

Credit goes to this SlickDeals thread. For those concerned with the impact to your credit score when you apply for multiple cards, there's a lot of discussion about this issue in the thread.