If you're a journalist, writer, or editor, you've probably either heard of, used, or referenced the AP Stylebook in some way. Now, the AP has released an iPhone app of the AP Stylebook [iTunes Link]. It's searchable, allows you to make notes, and offers features for easy access of suggested writing styles. However, this app costs $28.99, which is considerably more expensive than the printed version, which is available for $18.95 from the AP. If you're out a lot, and don't want to carry a big spiral-bound book around with you, you might want to consider this, although the price of this app may be limiting.