I found this fabulous Opening Ceremony blob dress the other day at Beacon's. It has two sleeves, a neck hole, and two dress endings, so you can essentially wear it many ways.
My favorite way to wear it is so that there is an extra sleeve hanging about channeling MMM. It sort of furthers my illusion obsession. I always love things that can be worn several ways, it's more of a design feat in my book. It's not such a one-dimensional piece because it's open to the wearer's interpretation and subsequently covers a wider range of design.