Pet Cam - Does anyone have one?

I've always wondered what my three cats are up to when I'm not home. Does anyone have a pet cam which has revealed anything interesting?

No, but I've thought about trying to set one up. Even if I can't check in on them while I'm at work, I'd love to record and see what they're up to when I'm gone. I did it once for Aussie when I was out of town. It was motion activated so I could see what she was up to when she walked in front of the camera. I also did it so I could check on a friend who was watching her for me.