I guess "griffith_76" took a liking to it because he built his own Optimus Prime Transformer that turns into a locomotive that looks pretty darn sweet, complete with a Nemesis Prime repaint. Below are just two pictures but the full gallery is worth the time to check out.
If you do like the toy and have money to spend, you can buy an unassembled kit for $125. For additional money you can get it pre-assembled ($80) and painted ($80). Full details are at Monoblog. It just shows that Hasbro isn't even close to taking advantage of the many iterations and possibilities of the Transformer brand.