I got so bored today I was backtracking through the XDA news today and got jealous of you Android people once again.  This time I ran across a live background of randomly generated Mario levels which is awesome in all ways.  Mario runs through three different levels (outdoor, underground, and castle).  As you can imagine this is probably murder on battery life but luckily there are options to tweak FPS and the background animations to help preserve your mAh for actually doing things.  This one is actually free, unlike the circuit board wallpaper I posted the other day so fire this up and let us know what you think.  Froyo and Eclair Android only folks.  Links here or this