Just found this and did not find it in this forum. Aparently you can now upgrade from a full Y international flight on any skyteam airline using miles from your particular skyteam account, regardless of the skyteam airline where you bank miles. So as a delta skymiles member I could purchase a flight on Korean Airlines and upgrade with skymiles. It is 25,000 miles one way, there has to be availability, and it has to be a full Y fare but it mentions this is a first step. Might help some folks whose companies say they must buy coach seats. I would be more interesting if they increase the possible fare classes.
http://www.skyteam.com/EN/aboutSkyte...r/pr141108.jsp