Have been playing with google sketchup a lot lately, and started re-learning Maya to improve my chances of getting hired in the gaming industry.
I have been using Sketchup to bring quick 3D images into my 2d concept drawings. Here is a fictional Hong Kong style street/canal picture I built which will be colored up in Painter X.

I built this ship in Maya 8.5 based on a sketch I made
(see older post) and plan on learning how to unwrap UV's and texture it as well. Kinda like a 'remember how to play with Maya' project. I finished the model a couple weeks ago.