From 9to5Toys.com:

Walmart today lists the iPad 2 in all sizes and varieties with a “Starter Accessory” which include previous generation Smart Covers or USB wall chargers (or $50 iTunes Gift Cards when ordered and picked up site-to-store).

If your shopping tastes take you to Target, you can get a $40 Target GiftCard with iPad 2 purchase (or $450 iPad 1 32GB 3G/GPS). They also have various other iTunes/Apple device offers via circular including this 10% off printable coupon, below: