Nancy- Congratulations. Somehow your questions started a flood on this mailing list! I am teaching a pilot course for the AP Stat course at an independent school in New Jersey this year. We are using Moore & McCabe's Introduction to the Practice of Statistics, and I really like it. It is heavy going in some spots, but if you really have AP-level students, I think they can handle it. You do have to pick and choose what you ask them to read. By the way, it was recommended to me by Fred Djang, who is the only secondary school teacher on E.T.S.'s advisory committee for developing the exam. I am also trying to integrate Minitab into the course, because ETS wants then to be able to read computer output. So far we have been able to do everything we need to do on the TI-82, with appropriate programs (I picked up a package of freeware programs for the TI-82 at the NCTM regional coference in Philly in December--I can't remember what it's called). The TI-83 will have all that stuff built in. I may find Minitab more useful when we get further into inference, but at this point I have to consciously look for ways to use it. I did look hard at Data Desk last summer, but I think it's harder for students to learn how to manipulate the data sets.
You definitely should call Addison-Wesley (1-800-447-2226) about the student edition of Minitab. I can't imagine needing the full version educational purposes. It is only $40-50, and they'll loan you an examination copy.