During the Street Fighter panel at Comic-Con, Capcom has a collection of summer themed Ultra Street Fighter IV costumes scheduled to come out shortly after the retail version is released on August 5. Some of the costumes shown were Blanka in a Hawaiian Shirt, Poison wearing a Chinese dress with a tattoo, a bikini costume for Decapre, and Dan in fishing gear. All of these costumes were designed by Udon.
Capcom also shared a Capcom Figure prize code for Ultra Street Fighter IV. Punch this in to the game: