Bonne Bell has been making flavored lip balm for quite a while.
http://www.lipsmacker.com/products.phpIf you look at the last row of products, there are lip balms for Skittles, M&Ms, Dr. Pepper, Starburst and more. I have a Cherry Coke one in my purse right now. I didn't see that one on their website. I wonder if they still make it?
Edit: Atlin- The Skittles lip balms are good. They don't really taste any different than regular fruit lip balm, except maybe a little sweeter.