There’s been a lot of iPhone apps for musicians since the launch of the App Store, but getting the iPhone set up to be legible while you’re strumming your Strat can be a hassle. The Guitar Sidekick is a simple device that aims to fix that. It attaches to the head of your guitar and lets you view an iPhone, iPod Touch, Android smartphone and even the PSP while you play. It rotates into either a portrait or landscape view, and doesn’t affect the guitar’s tuning. It’s available now for $29.99.