Vue: No-Fuss Webcams
If you want to keep an eye on things at home, but you don't want to string wires all over the place, Avaak Vue Webcams could be just the ticket. These palm-sized cameras need no wires, attach to anchors you stick to a wall and can operate for as long as a year on one battery. They communicate with a gateway you connect to your router and voila, you can see your cat's latest follies through any browser.
The system appears to be super-easy, but not super-cheap. A kit with two cameras, one gateway and four mounts is priced at $300. The company promises to ship the Vue in early summer.