OpenGL ES 2.0 Programming Guide has 3Gs Sample Code

The authors of the OpenGL ES 2.0 Programming Guide have created Xcode projects for all the code provided in the book. This makes the book a lot more interesting from the perspective of an iPhone developer. Anyone read this book and have an opinion on it?

If you download the sample code for the iPhone 3Gs, make sure you grab the build instructions, as it's a little more complex than just opening Xcode and pressing ?B.