Next robot
I've completed work on Light Bot. You can read about it here.
I'm already thinking about my next robot. I'm thinking it's going to try and map out a room. To do this I think I will have it use various types of either sonar or bump sensors. I'm still very much in the planning stage. I suspect this robot will take a significant amount of time to assemble. Most of this time will be spent researching and testing various sensors.