Looks like the folks over at Rawland Cycles have introduced yet another 650b frame to their line up. There is no ETA, but the details are:
Fixed gear specific Disc tabbed lugged Rawland fork. Pacenti designed geometry. Extended headtube. Braze-on options Additional color choices, light blue, simply orange. Currently 132.5mm OLD spacing.(edited due to update from Rawland) 3 bottle cage mounts.