Woma pythons can be kept in tanks, though as adults they would require a rather large floor area in the tank. I would also guard against extremely low humidty conditions inside the tanks if the owner lives in dry cold winter areas. Humidity is best at about 40-50 percent. I keep mine in ARS 8018 racks. CB70 tubs are just too small in my opinion, especially for adult females.
No proven morphs yet, as far as I know. With a bit more time, some of the oddballs, such as the black woma you mentioned, and reduced pattern specimens like what I hatched last year and others have hatched, will be proven or disproven.
Yes, I house them seperately.
I have a small mismash of woma photos here:
http://www.claudius-r-us.com/gallery...s.php?album=10