Craft Studio has just came to my attention, it promises much and with any luck it might deliver.
CraftStudio is a real-time cooperative 3D game-making platform!
You can make your own 3D models and maps, put them together in scenes and add behaviors to them
Its still fairly basic but you should be able to knock up a quick clone of yourself in no time following some of the many online guides, there are also plenty of videos you tube.
