I have been navigating around the forums, Github repo, FAQ, etc and cannot seem to find the way in which you create a server running Sponge. I am aware that Sponge is still in the early stages of it’s development but I am still curious as to if this is possible. Any reply will be much appreciated :).
You could build the binaries from source yourself. The first steps are described at https://github.com/SpongePowered/Sponge/wiki/Setting-up-your-Workspace. If you don’t know how to set up the tools mentioned there, you’re probably better off waiting for the first official versions.
If you are familiar with the Forge mod workflow, you can get a Sponge server and client running in a few minutes. What I read in the forums, it’s not recommended to start working on plugins yet because of the unstable API.
When sponge is at a better state, I hope you will just created your server like a .jar, like bukkit. (Yes I said the B Word ) Don’t try running a sponge server, it is currently NOT stable .