Ok - so iRobot (the people who make roomba, scooba and the pool cleaning robot) now make a robot with a web cam that you can drive around your home from anywhere over the internet and see what's going on at home while you are away.
Check it out here
I would LOVE to be at work and chase my cats around the house with a robot web cam!
The bad thing about cats are you never know where they are and they are usually in hard to reach places (like the top of my closet or on a table). Now when Shelby lived with us you could leave the camera stationary on her spot on the couch and she'd be there - even though she wasn't allowed on the couch.