We have been involved in the development of a new open source teen size soccer robot for 2 years now (and the improvement still goes on!). The main development was done by the University of Bonn, institute AIS, Professor Sven Behnke, who also developped our open source robolink software IME (igus motion editor), igus contrubuted the design and technology of the outer shell parts (made by 3D printing / SLS). In the next stage we will improve the cabeling inside the robot with our chainflex know-how for often bending cables.
This youtube video shows the current state of the software development (thanks to Philipp Allgeuer for sharing it).
The open source project is documented by Prof. Behnke here with open source data: http://www.nimbro.net/OP
And the 3D Step data of the robot shell (3D printed parts) are shared here by igus: https://github.com/igusGmbH/HumanoidOpenPlatform