Calling all ZScript authors! Here it is! The newest ZScript Command Reference is now available, including everything that's new in ZBrush 2.
This comprehensive reference lists all ZScript commands, along with their complete syntax, variables, and example of use. They are broken down by function category, and also color coded to help identify what level each can be used at.
It is also hyperlinked, so that when reading about one command you can quickly jump to related sections of the page. An index of all commands is at the bottom.
We will be posting more info about ZScripting as we are able to do so. This should give you a good place to begin, though!