This humanoid robot butler, Robonaut2 (R2) is a HIT on Twitter: he's (it's?) got over 10,000 followers -- closing IN on 11,000 rapidly.
OK, I'm officially jealous, and he/it hasn't gone on a mission yet!
See: Robot Butler for Astronauts Is a Hit on Twitter, By Zoë Macintosh
Three things to remember: