After successfully porting Siri to the iPhone 4 and iPod Touch 4G, the dynamic duo chpwn and Steve Troughton-Smith, managed to port iPhones personal assistant to the 3GS. There is no word on when or if it will be released to the public. In theory, the distribution of Siri is illegal , but there might be a workaround it. Check out the movie after the break.
Source [tnx FSM]