It sure is a great ooking plant whatever it is! I didn't realize that was the trunk of the plant ... I thought it was a Colocasia growing on something else!
I sure hope someone comes along with an identification because I sure am curious as to it's identity too! I bet if you post that photo over on the Aroids forum:
http://garden.org/forums/view/... Lari Ann and others will recognize it!
I'm hoping that this Plant ID Forum will eventually get more traffic but it seems pretty quite right now, some people may not be aware of it yet so your best bet for an exact ID might be from those over on the Aroids forum.