horrible idea
I really don't like things trying to be other things. My phone is a phone. It's not a Japanese translation service powered by the camera on it. Kinda begs the question why I'm in a Japanese restaurant when I can't read.. how did I even know it was a restaurant?
Maybe I can offer a development to the service tho, if you see someone on the street you quite fancy, you can take a picture of them on your cameraphone, it can connect to various social network sites and tell you where they live so you can stalk them using GPS.
Really I shouldn't give these people ideas should I?
Wonder how long it will be before someone actually sues a mobile phone for cybercrime.