Both platforms could stand better motor- servo solutions. I would like to see an integrated motor and drive control solution. I believe the Dynamixel AX-12+ Actuator would be a good addition to both platforms. See this link for specs
http://www.crustcrawler.com/motors/A...ex.php?prod=63
Both controllers would have to be tweaked to allow the high speed serial link, but the benefit is that the motors can be packaged as a program object easily. At 44$ they are not cheap, but how much does a motor and a encoder cost and they still are not thermally protected and do not give torque feed back.