This was my latest project. I managed to put it together in secret for Andrea. There's a few things left to do to it, but it's more or less finished.
It's meant to be a fixed gear, so the tire clearances are really tight. I managed to track down a 120mm Sturmey-Archer 8 speed hub. It was really easy to set up (far easier than an Alfine) but the gearing is a bit weird and will take some work. Your highest gear is 1 to 1, and then you have a series of overdrive gears above that. So I need a smaller chainring.