Called Delta Skymiles and had no problem booking flights to/from LAX to SYD with miles. I even was able to book return from AUK. The problem was that they had to route us via Seoul which added a 10 hour leg to the flight. Korean Air is their only partner in that part of the world.

VOYAGER:
MC to FLL 11/07
MC/Dover 6/06
MARINER:
BCN / Ven 10/11
Alaska 2001|2006
Panama Canal 2003
NAV
Caribbean 11/06
Bermuda|New Eng/Canada 6/04
PG 5/05
OCEANIA
Nautica |Ist/Athens 6/07
Regatta|Baltics 6/08
Riviera 2013 Crossing -Istanbul to Miami