My entry for the contest. Only finished it just in time, but have been working on it for a while.
It's a model of the famous EMD Class 66, it's 8 wide, and thus very close to be exact minifig scale. For more pics and info:
Visit My MOCpages site
It's non-powerd right now, but is designed so that PF can easily be installed. This one is going to stay a display model, as it's the locomotive I drive in real life. Another Class 66 is under construction that will be PF from the start, but it won't change the design.
Features: V-12 engine with turbo, removable hood, build-up trucks (three axle, but able to negotiate curves/switches) and turning "timkin" bearings, detailed fronts, look-through radiator "mesh" imatations, uneven length cabs (as per original), all prototypical decals (self made), sand boxes,...