When you create a camera on sensr.net you can now use your laptop's built in webcam. (Note that you'll need to login with Facebook Connect to activate the Add Camera link.) This can come in handy when you want to keep an eye on something. For instance, I setup my MacBook pro in the corner of the master bedroom and left it monitoring the room. It took about a minute to setup.
In the shot above you can see me viewing the "Live Preview" of the MacBook's camera on my iPad. Later you can see the cleaning lady come in and tidy up.
While in this example, I'm using the iPad as a viewer and the MacBook as the camera source, anyone can view the camera since it's on the sensr.net site. I've set this camera to public so it's open to the world. Your cameras can be private or restricted to your Facebook friends.
Setting up cameras on sensr.net is free for now. Give it a try and let us know what you think. For more details on the Live Previews feature, see this article on our sensr.net Google Group.