This looks pretty cool. Granted, most of you won't be interested in this because it's for external flash units. However, depending on how sturdy it is, it looks to be a really useful tool in terms of redirecting light in every way imaginable. Plus the 3D gallery deal is really fun to play with. It's not available yet, so the price is still unknown.
Presslite's VerteX (click on one of the configurations)