Go here: http://www.poopinmymouth.com/tutorial/tutorial.htm And download Low Poly Character Series, Delilah Part 1, Concepting in Photoshop. (Its the first one) He makes that girls space suit and gun from scratch on that video. You HAVE to see this!! i seriously dont even know what to say.
Some quite skilled artisery. I was impressed. I don't see why he doesn't just stick to drawing, I didn't much like the look of the final model but the concept was amazing.