BoingBoing today mentioned a fascinating Google hack which locates unsecured webcams. Just plug the following term into the Google search box. Note that Safari does not support JPEG streaming - use FireFox instead. Note that you can pan and zoom the camera by clicking the controls on the left!
inurl:"ViewerFrame?Mode="
This discussion also produced a couple of variations on the theme:
inurl:"MultiCameraFrame?Mode="
inurl:/view/view.shtml?videos=
IF only we could have accessed those cameras in Area 51 or Fort Knox...