My friend Mark Cooke, a Tokyo-based game developer, has just released the first iPhone app he’s worked on, a sleep-inducing visualizer called Prescription for Sleep, featuring music composed by Norihiko Hibino — he’s best known for his music on the Metal Gear Solid series. Read more about this interesting app on Mark’s blog, or at the publisher’s site. Here’s a link to the iTunes App Store (there’s a also a free lite version available).