The World According to Pi Robot 

More recent articles are listed first.

Sep 2013:
 Behavior Trees: Simple yet Powerful AI for your Robot
Jun 2013: MoveIt! The new motion planning framework from Willow Garage
Jun 2013:
 Miscellaneous Updates
Jan 2013:
 Pi Robot Meets Arduino
Mar 2012:
 ROS by Example: HTML5, Javascript Pi Face Tracker GUI by Scott Bell
Jan 2012:
 Pi Robot Passes First Navigation Endurance Test
Dec 2011:
 Pi Robot Rebuilds for 2012
Nov 2011:
 ROS by Example: Head Tracking in 3D Part 2
Oct 2011:
 ROS by Example: Speech Recogition and Text-to-Speech (TTS)
Jun 2011:
 ROS package released for pi_face_tracker
Jun 2011:
 Pi Robot does Face Tracking
Apr 2011:
 A Roadmap for Pi Robot
Apr 2011:
 National Robotics Week Photos
Mar 2011:
 ROS by Example: Head Tracking in 3D (Part 1)
Feb 2011: Pi Robot gets a face lift: Trades webcam for Kinect RGB-D camera
Jan 2011:
 A Brief History of The Pi Robot Project
Dec 2010:
 ROS by Example: Head Tracking using OpenCV
Nov 2010: Robot Cartography: ROS + SLAM
Nov 2010:
 Pi Robot Meets ROS
Aug 2010: Robot Agents, Messages and The Society of Mind
Jul 2010: A Month in the Life of Pi
May 2010: An Introduction to Robot Coordinate Frames
Apr 2010: Peppy and Pi become One
Jan 2010: Hardware and Software used on Pi and Peppy
Jan 2010: Object Tracking Using Visual Filters
Nov 2009: Learning in Neural Networks: Part 2
Nov 2009: Learning in Neural Networks: Part 1
Oct 2009: Artificial Neural Networks & Robotics
Sep 2009: Obstacle Avoidance using Omnidirectional Vision
Jul 2009: Obstacle Avoidance in the Real World
May 2009: Where Am I?
Oct 2008: Pi Robot Gets Panavision