they can use any zone except that a player can not park in the paint for more than three seconds
from what I've seen on TV they are basically using the 'pro zone' that would get an occasional illegal D call under the old rules, the defenders stay on whatever side of the free throw line they want instead of having to match up with what used to be their man
haven't seen any 3-2 or box and one as in the college game
you'd think a losing team would get experimental

A