I think it would be a cool feature if list formatting allowed different alphanumeric labels (besides bullets):
1. First step has its own child steps a. Lower B. Upper 1.2 Step parent.child 1.3 This is step1.child3 Some formatted text I. Roman II. would III. be IV. cool 2. etc...
Thought about this when answering:
Use gcc 4.2 in Xcode 4.2 and iOS SDK 5.0