Having trouble finding Monorail tracks? Not a problem for Brickshelf user Hidaka. Not only has he designed his own monorail track but also a custom train and - best of all - mechanized points (switches). One great switch design would be enough, but Hidaka has two - one using a worm drive and gear rack, powered by a 9V motor, and one driven by a pneumatic cylinder.
Plus, there's an awesome video showing the whole setup in action. You have to check it out!