We had a great time at the January 26th meeting of the Homebrew Robotics Club, which was held at Google. There were many quick show-and-tell demos of various hobby robots followed by the featured presentation, "ROS for the Rest of Us", given by Patrick Goebel. Patrick is the creator of Pi Robot and maintainer of pi-robot-ros-pkg. Patrick writes regularly about ROS on his website, including a tutorial on visual object tracking using ROS.
There were several ROS-related presentations during the show-and-tell. Tony Pratkanis presented his ROS + Neato platform, Melonee Wise and Tully Foote introduced the "Turtlebot" platform (iRobot Create + Kinect), and James Bowman demoed an Arduino board running a full ROS node.