Forget that. iPhone development is hot. You want a nice landing place for anyone who Google's "iPhone development forum", "iPod touch developer", or "iPhone SDK", with an obvious title like "iPhone Developer Forum".
Some developers will have little or no interest in Cocoa/Mac programming itself, only on doing stuff on their iPhone (except that Steve was sneaky about causing them to learn Cocoa/Mac programming anyway, whether they know it or like it or not, when they start with the SDK tools 🙂