Use main camera live image as desktop background

Nicolai Hess has documented a hack, which he is calling "Poor Man's Live Wallpaper." This fun, albeit battery eating, setup uses the N900's rear camera's live image as the desktop background: Not that useful and a battery killer for sure. You need the packages x11-utils, gst-tools, and maybe gstreamer0.10-plugins-good and gstreamer0.10-plugins-good-extra... Aside from being a bit difficult to get running, it also requires the use of some command line code. Unlikely to be useful, considering the 20% battery usage, it's an interesting hack which may encourage others.