I'm not sure if Mach3 is/will be offered with the lathe, but I'm currently using and testing it on the KX3 mill. I'm brand new to CNC, so I've got a lot to learn, but I have the mill working and have done some basic GCODE programming. I'm in the process of writing a product review that will be published on my web site,
www.mini-lathe.com, in the next week or so.
As far as I know from talking with the manager of the Sieg plant, no US distributors have been established to date for the CNC products. Sieg is actively working on lining up distributors, so I would expect that one or more will be in place by spring 2008, if not sooner.