Gumstix TurtleCore Expansion Board for iRobot Create
Last month, Gumstix announced the TurtleCore expansion board for iRobot Create Programmable Robot, featuring 3 USB ports, several male-header pins with GPIO access, as well as standoffs and screws to support the TurtleCore in the Create cargo bay.. The TurtleCore is a baseboard for TI OMAP3 and Sitara based Overo COMs or Overo STORM series of COMs that replaces the Command Module on iRobot Create to provide a more flexible and powerful solution.
Overo COMs have very good Linux support (OpenEmbedded) with source code, tools and documentation available, including support for the Robot Operating System (GumROS) for high level programming. They released the hardware early so that the community could work on the software, and there have been some good progress as you can see from the video below.
You can already download the schematics and PCB layout file, but the software and instructions do not appear to be available publicly yet.
Further information can be found on Gumstix TurtleCore page.