Forget the Roomba--get a robot spy
Bandai makes a voyeuristic bot
This is one little guy that could be dangerous. At first glance, Bandai's NetTansor looks like a lot of other cute robot toys on the market--but don't be fooled.
It's equipped with a WiFi webcam that can beam transmissions back to its owner's screen, according to Gizmodo, with a power supply that can provide up to "two and a half hours of voyeuristic fun." You can talk to it through email or just let it bop around on its own, because the NetTansor has sensors to keep it from running into walls or inflicting other harm, a la Roomba.
So if you happen to see a 1-foot, 2-pound bot rolling your way, be on guard.