Piece of ME is also offering a $50 Sonic gift card here http://www.makingmyamericandream.com/2010/09/celebrate-with-sonic-drive-in-review.html
Sweet! Sonic has the best frozen coffees if you dont have a Starbucks nearby, and their fries are way better than any McDonalds. Of course, I rarely (OK, NEVER! eat at McDonalds, but I do occasionally stop at Sonic!)
So, go enter! You could be drinking a free frozen Mocha coffee with extra espresso, and nothing is better than coffee, especially when its free!