hehe your post is funny...and the idea of hiding all your crap under a beautiful wallpaper is akin to pushing all your crap under your bed...hmmm
While we're discussing apps to help you sweep things "under your bed"...I've used Desktopple for several years. It is available in a feature-rich Pro version and a Basic version (and a cool Widget!), both offer a free trial, then, if you like it, the $17 for the Pro version. I run the Basic on my 10.4.11 PB G4.
I first came across the FoggyNoggin software creators when I was looking for a rapid method to clear the deck for AV presentations and screenshots. Not all of us have messy bedrooms, but sometimes it's just smarter to "keep the door shut for company".