Only our hosting service is in closed alpha. The source code is all open (https://github.com/sandstorm-io/sandstorm https://github.com/sandstorm-io/sandstorm) a

Only our hosting service is in closed alpha. The source code is all open (https://github.com/sandstorm-io/sandstorm https://github.com/sandstorm-io/sandstorm) and there's an easy installer script (though it requires a Linux machine), so you can start hacking any time. :)