A piano has 88 keys, and this arrangement of iPhones comes pretty close (we counted 84). The pianist has six iPhones laid out in a row starting from a low C and progressing through 5 octaves. As a result, he can play a nice piece of music on very tiny, touch-sensitive keys. That takes a good bit of dexterity. He has obviously been doing his Hanon exercises. There are a number of piano apps in the App Store, including Pocket Piano [iTunes link], Virtuoso Piano [iTunes link] and Mini Piano [iTunes link]. We can't tell which app is being used here, but the UI closely resembles that of Mini Piano. Budding artists may wish to practice piano with GarageBand '09 or work on sight reading with Key Wiz [iTunes link]. [Via Swiss Miss] Read More