I have mine set to change every 10minutes, so I'll just post up the one I have now...
It's generally a selection of pictures I've taken from Speedhunters. Then I drop them out of the background slideshow when I get tired of them. Theres the occasional shot of my car in there too.
Oh hang uploaded wrong photo this is actually mine at work, my wife would prefer the previous was mine...she gets all funny if I start looking at cars online...