Hmmm...
Modeling:
Spaceship cockpit or interior
Mech
Large space cannon weapons
Hand held weapon (rifle or pistol)
Car (muscle, concept, original)
Moonbase / Outpost
Best Texture, or scene composition.
How about a scene that has to built with items found at only this site?
There are some great meshes here that I've not seen in a scene - it could be cool.
Of course - there is also animations.
Just bouncin' ideas.
Hope some other people do too.