With this document you can view the progress of the Basewars project (including both multiplayer and single player levels, since they are infact closely linked in terms of content but will be seperate releases)
So, looks like a lot? Sort of, yet not really. I guess it depends what kind of knowledge you have about the next steps, of which I have a considerable amount... So x2 - When's it ready for testing? Soon... Hopefully early July.

The single player level probably won't come along until August or later.