Sounds like a lot of fun right? I'm stoked!
So far we've only done thumbnails, which are essentialy really quick and dirty sketches with little to no shading just to block in the proportions and silhouette of the design. Here are some of mine. They were more conceptual than purely visual so some of them might be hard to get.
Homework for next week will be to take two or three of these designs and do some additional thumbs of them and flesh out the design some more with color and line if time permits.