yea i was reading yesterday that siri has already been successfully ported over to the iphone 4, with a minor glitch. some speculated that siri requires certain hardware to run thus only being on the iphone 4s. however this sint true. there is no way that a voice recognition system the size of siri would run on any 3g or 4g data properly. sisri actually has its own servers designed specifically for the software that allows it run smoothly. this is another reason why it is so difficult to port to other iphone models. apple can block foreign phones through these servers. not to worry though, the emphasis on it being exclusive is solely to promote iphone 4s sales. im confident it will be on the iphone 4 before too long. it is still in beta. ive played on it from a buddies phone and it is very sensitive, picks up all the background noise rendering it useless unless you are in a library. apps like vlingo work pretty well