Well, I couldn't get Blender's new sewing feature to work so I had to model this by hand and using Poser's Cloth Room. I have a few more tweaks to make to it, but so far I'm pretty happy. I AM having a little bit of an issue with the Cloth Room though. The dress has no real thickness to it, but that drape in back should have some. Plus you can't really see it in preview because the normals are reversed in some places. It renders okay, but you don't know what's what until you do.