iPhone Hacks

With the book iPhone Hacks you can make your iPhone do all you'd expect of a smartphone -- and more. Learn tips and techniques to unleash little-known features, find and create innovative applications for both the iPhone and iPod touch, and unshackle these devices to run everything from network utilities to video game emulators. Cost is less than 35$ for the paper version. Update: this is by far the most useful and interesting book for iPhone users, that I ever had the pleasure to read! Highly recommended! Big wow factor!