*This is very interesting indeed, yet, somehow, I feel sorry for this guy... Why? Because he has to sit down at attempt to think seriously about this. With real objects in his house.
*I never heard anyone personally explain why Roombas are irritating... That's pretty good. "Vacuuming the uncanny valley," eh? Yeah, good luck with that!
http://russelldavies.typepad.com/planning/2010/11/designing-behaviour.html