I'm currently doing the tutorials from O'Reilly's 3D programming for the iPhone and have come across some difficulties, mainly one in particular.
I searched their website to see if they hosted any forums where people could help with the tutorials in the book, but it seems as if they are fairly select about which texts they decided to host discussions on.
Is there any place that specifically deals with the exercises in this book? If this doesn't already exist I think it should. Learners and teachers coming together around individual titles would make the readers feel a lot more comfortable picking up O'Reilly's texts.