Screen Grabs chronicles the uses (and misuses) of real-world gadgets in today's movies and TV. Send in your sightings (with screen grab!) to screengrabs at engadget dot com.
CBS's The Big Bang Theory is the super popular sitcom about brilliant nerds. If you've been watching, you've undoubtedly seen Steve Wozniak's recent guest spot -- but there have been other notable presences, too. Willow Garage's Texai telepresence robot recently made an appearance as "Shel-bot" -- a stand in for the character Sheldon. While we didn't get
