(January 2007) I've recently started learning Maya and this is my first project using it. The idea popped into my head one night as I was drifitng off to sleep.
It's a Wire Tree made out of twisted together pieces of wire on a random floating piece of earth with roots sticking out the bottom.
There was a lot of Photoshop work afterwards (such as the entire background and some color correction), with the rendering done using Mental Ray.