Could i suggest you would pick up the Linux side of things, and make the alpha also a first class Linux citizen.
I would really want to purchase the Outerra at this point, but for some reason or another, it is still M$ only.
So what is your ideas behind bringing the Linux Outerra out there? I would hate it if i could not get in on the cheaper Alpha registration prices just because you decide to add Linux support after full release...
Cheers.