A lot of models and designs on Shapeways are immediately interesting. You can see from the thumbnail that this is going to be a fun, others are not so obvious.
Take Edward Hibberd(ARHib)'s Kweijebo model. Look closely, the description should get your blood flowing though, "Antweight class robot 106g." Antweight is a "class of fighting robots under 150g." These tiny, light mean machines battle it out and Andrew made a chassis & body for one with Shapeways! This stuff really makes our day! Check out his awesome robot in action below.
That disc on the front, spins at 12,000 RPM! You can check out more pictures on the forum. Andrew has been building robots for five years and we hope he does really well in competition!