Let me help you get started:
Yeah, I wouldn't even know where to start.

I want to do iPhone development
, but I'm pretty sure not
too many schools offer
such a course
, so getting
them to create it for me to teach would not be an easy task.
1. Prepare a
Curriculum Vitae. This is an academic resume. It should contain your educational background, scholarly activities (such as programs you've written, especially those for the iPhone), and relevant presentations and publications, if any. It should also list any previous teaching experience for which you were paid, and any service you have provided in your discipline. It must convince them that you are competent to teach the course.
2. Prepare an provisional syllabus. This should have a course description, credit hours, list of prerequisites, course objectives and a weekly schedule. If you're planning on using a book, that should be listed as well. Be sure to include graded assignments, such as coding exercises and exams, and grading policy. This is a contract with the students so their expectations are clear.
3. Call or email the departmental Chair and attach these two documents and provide him/her with the rationale for the course offering. If they have interest, then you'll likely get a "topics" course to see how it goes and how you do. They do not create the course - you do. They either accept it (with or without modifications to the course proposal) or reject it.
4. If the Chair asks you to come in for a visit, make certain you present yourself professionally and be prepared to ask about institutional resources for teaching such a course. I suspect you will need plenty of iPhones, and those are not cheap for educational purposes.
Importantly, be sure your spelling and grammar are correct in all of these communications.