I have two in the ground since May. They are already close to 6 feet tall and grow very fast. As I noted in another article, I used Dr Hakkinen's article and it does match up very well with Musa Itinerans var xishuangbannaensis (small smudges of wax on petioles, purple-black markings on ptem). Although I guess it is possible that it is a Musa Itinerans var Itinerans. But it shows traits that I'm not faimilar with on regular Itinerans. I plan on leaving mine in the ground with heavy mulch much like my Basjoo here in zone 5b.
I have somewhat recent pics at the end of this thread. I have some newer ones I can post if anyone wants.
Musa yunnanensis officially described!