The costume won the Workmanship award. (They gave out awards in categories, rather than trying to name the best overall.) I got a free membership to next year's Penguicon. Everyone who said anything about it said it was "cool" or, like Neil Gaiman, "neat!". I'll probably wear it aroound the con tomorrow, too.
I've got a page describing how I put it all together, complete with pictures along the way.
Thanks to bronxelf_ag001 for much patient help and answers to dumb basic questions. I couldn't have done it without her assistance.