I'm sorry if this was posted here already, but has anyone tried this Siri port. I here it has been working.
http://www.iphonestuffs4u.com/how-to-install-siri-on-iphone-4-ipod-touch-4g-without-proxy/
http://www.iphonestuffs4u.com/how-to-install-siri-on-iphone-4-ipod-touch-4g-without-proxy/