So, it's a very long time since I last posted here, and it looks as if the site will be closing. What happened with my projects?
Well, I stopped doing robotics stuff around about 2013. It was a deliberate choice to re-focus my effort on other things which I thought were of higher priority - those being more general internet service self-hosting along the lines of FreedomBox.
Between 2011 and 2013 I did a lot of development on the Turtlebot and also GROK2 - a very large robot about as tall as myself. Those projects were outrageously successful compared to anything I'd done previously, mainly thanks to the ROS operating system and the Kinect sensor. I devised a simple home navigation system which used a combination of button presses and text-to-speech so that you could direct the robots to particular locations in the house. Navigating through doorways was sometimes hazardous, but most of the time it worked.
I didn't completely lose interest in robotics or AI in 2013, and I think it's still very likely that in the coming years I'll return to some new robotics project. There are many challenges still to be overcome.