In women's euroleague, a very good Italian club (FAMILA SCHIO), runs very well an interesting match up zone defense. The (very good) coach of the team Maurizio Lasi achieved to hide the disadvantages of his bad defensivly players thru this zone, to confuse a lot his opponent and make them play very slow and to increase the possibilities of winning. Finally the moderate (until that time) team manage to entry to the final 8 of euroleague.
The rules that has that defense is mostly to follow every danger cut, to adjust and take positions very fast to 2-1-2 zone even if the point guard need to fill the middle of the paint or the center to follow on the top of the key. Of course in order to play that zone defense you need to have big guards, athletic bigs and excellant communication.
Maybe at the following video you'll have the feeling that defense is in man to man, but trust me they stay in zone.