You may know the name "Trent Troop" from various toy projects, including BMOG. I found out he's been busy on Shapeways, and well, look at a beta project he has up there.
Rampager Rex is, apparently, the result of someone reaching in to my dreams and making something great. 5mm compatible arms means you may be able to plug in various Transformers and BMOG weapons, and the look... just look at it. It's gorgeous. It's in "beta" and it's $10.88 right now. And I don't know if I can go on living without one for much longer.