After playing with Siri for about a week and I couldn't help but think that a iPhone nano with no input keys is actually very possible. What if you have something that is light enough to hang around your neck, or wear like a watch, or just slip inside your wallet or something. It doesn't need to have huge battery because you don't need to power a big screen any more. I guess the question is whether there is a market for that? I think it will pair well with people who has an iPad like me what do you guys think?