I've seen a few wall mounts too, but this is by far the ugliest one I've ever seen. It looks very impractical as well. The best ones have an LCD monitor flush mounted to the wall that swings out on hinges and has all the guts on the back of the monitor.
The keyboard is optionally mounted (with mouse on swing-out mouse pad) on a drawer that slides out of the wall on a step angle, under the monitor.
I'd post pictures, but I'm forbidden to take them.