They may well give it to iPhone 4 users too. I wouldn't be surprised if they released it as an iPhone 4 and iPad 2 update some time in the future. Why not do i

They may well give it to iPhone 4 users too. I wouldn't be surprised if they released it as an iPhone 4 and iPad 2 update some time in the future. Why not do it now? Because Siri is still beta, causes server load, and they want to limit just how many millions of new users it will have to suddenly serve from one day to the next.