Robotics Update

Not too many years ago, climbing stairs was a difficult task for robots. Now they're able to do so in a variety of ways:

http://singularityhub.com/2009/05/05/robots-take-to-the-stairs-this-is-just-the-beginning-videos/

Robotics Update

A new hexapod robot can climb stairs, crouch under small spaces...and dance:

http://eetimes.com/news/latest/showArticle.jhtml?articleID=209904252

(Be sure to watch the video.)