Siri Hacked to Run on iPod Touch and iPhone 4
Siri the exclusive app build only for the recently launched iPhone 4S has been hacked to be used on the iPod touch and iPhone 4. The app was facing continuous hack attempts but the smarter ones were unable to completely hack it, as the voice recognition functionality requires authentication from Apple’s server.

Following the saying nothing is impossible two developers @stroughtonsmith and @chpwn are completely successful in hacking Siri which works perfectly fine on the previous hardware. Apparently a public release is not disclosed yet due to Apple’s terms and conditions.
The developers have stated although the hack attempt is successfully made but one still has to speak loud and clear in front of iPod touch due to its poor microphone capabilities. But for the iPhone 4 it works fine.
Well for the users they can wait up til some jailbreaks are up for the 4S or if they really want to enjoy Siri experience they should get a hand on iPhone 4S.
via [Mac Rumors]