The next update for the iPhone version of Street FIghter IV adds at least one new fighter: Sagat. One of the screenshots included with the update also shows Dee Jay, who, curiously, wasn't announced. Tiger uppercuts and MAXIMUM pants aren't the only new additions to the phone fighter, however: the update also adds a new feature that sounds like it's straight out of Super Street Fighter IV 3D Edition.
You'll be able to turn on a new mode that searches for nearby players while you're in single-player, allowing them to challenge you to matches even while you're playing solo. You'll also be able to exchange "player cards," should you happen upon someone else who not only has Street Fighter IV for iPhone, but is playing it right then.