The third iPhoneDevCamp kicked off Friday evening at Yahoo!’s scenic campus with an enthusiastic audience and an excellent talk by Chi Hua-Chien’s session on iFund, Kleiner Perkins’ venture fund for iPhone applications. Today started with a great presentation by Andrew Stone on ‘How the NeXT Computer Became the iPhone’. There are at least 400 people now, forming groups to develop their apps. Some are listening to BT, the current speaker who is a musician and DJ who is presenting his iPhone app Sonifi that allows users to remix music. Sonifi also has in-built stutter gestures using the iPhone accelerometer. You can stretch these stutters to extend sections of music which makes it sound metallic. Interesting stuff! After this session, a pizza lunch and four parallel sessions of talks on web and native development tools and techniques are coming up. Time to get back to work on our app for the hackathon!