Capcom has announced the impending arrival of another World Warrior to the iPhone's Street Fighter IV: the almost formally dressed spy, Crimson Viper. She'll be added to the fighting game through a free update, in the same manner as previous additions Cammy and Zangief. You can see a clip of Viper in action after the break, courtesy of IGN.
Capcom has yet to date this DLC, so you'll have to play Viper-free for now. In addition, Capcom hasn't made any announcement about a downloadable arcade stick for the iPhone, probably because that technology doesn't actually exist.
Street Fighter IV has returning favorites Ryu, Ken, Chun-Li, and Dhalsim. The characters and environments are rendered in stylized 3D computer graphics (CG), while the game is played in the classic Street Fighter 2D perspective with additional 3D camera flourishes. The traditional six-button controls for the game will return, with a host of new special moves and features integrated into the input system. Mixing tried-and-true classic moves and techniques with all-new, never-before-seen gameplay systems, Street Fighter 4 brings a brand new fighting game to fans the world over.