It was a big weekend for the social gaming world at SXSW, with the launch of Facebook Connect for iPhone. Several top developers launched Facebook Connect support in their iPhone games, including Tapulous, Zynga, and SGN, who released a new iPhone and iPod Touch title, Agency Wars, and integrated Facebook Connect with its hit Wii-like title iBowl.

Playfish also made a big launch announcement – Who Has The Biggest Brain? is now available on both the iPhone and iPod Touch. The company, one of the top social game developers on Facebook with over 26 million active monthly users across its portfolio, has kept the core dynamics of the game while optimizing for the iPhone interface.

These modifications take advantage of Apple‘s Multi-Touch user interface, but veterans of the game should find everything else to be quite familiar. It’s fully integrated with Facebook Connect, allowing friends to play together across platforms.

“Bringing Who Has The Biggest Brain? to iPhone and iPod touch is a natural extension of our mission to change the way the world plays games by creating experiences that are more social and connected,” says Kristian Segerstrale, CEO of Playfish. “In addition to Facebook and other social utilities, we believe iPhone and iPod touch represent the next generation of entertainment platforms.”

Players can currently purchase Who Has The Biggest Brain? For $4.99 at the Apple App Store.