I'm beginning the long path of learning to program objective-c, and so far I've bought only one book- Stephen kochan's programming in objective-c. I prefer to use Xcode to build the exercises so I was going to buy the mac xcode 2 book, but the forums say its not a good idea if I use Xcode 3. Does anyone know when Xcode 3 version comes out? Any other good books for building projects in Xcode? What about the cocoa book that's coming out in a few months? Also, are there any books on the iPhone SDK?