Haven't tried this but it looks awesome! How is performance?

BTW, I found http://interfacelift.com/wallpaper_b...obile_devices/ & http://interfacelift.com/wallpaper_b...obile_devices/ to contain lots of nice backgrounds. I found it via http://images.google.nl/images?hl=nl&q=800x480

My goal is to create some kind of pseudo-animated background based on the time of the day. Could be done in SVGs, transparent PNGs + background colour and/or image, or static PNGs. But I have some issues...