I read in Barrapunto the release of Cube Revolutions, IEArobotics Juan González’s worm-shaped robot.
Every documentation about soft and hardware designs are freely downladable (soft under GPL, doc under CC). You can download funny videos of Cube Revolutions too 
. The target of the project, in author’s words “is to create an open platform to investigate in modular reconfigurable robotics”
I briefly knew Juan in the CTSL’05, he was showing a proceeding about the free card skype.He’s an enthusiast of free soft and hardware, so I want to desire him good luck to the next release of his creatures