Here's my map submission (google spreadsheet): http://goo.gl/lShZs
It's designed to follow a fairly classic assault map feel, where you have your home base and the enemy has theirs, and your goal is to defend your base whilst capturing the opponent's base. It should promote a lot of interaction both within your own alliance and with the opposing alliance.
And in image form:
Also a copy of the text description from the image:
This map is designed to set up the 2 alliances with a reasonably secure starting location, with *no fed* (go play with your alliance!), meaning that each alliance will have to rapidly migrate to their galaxy (which will contain alliance owned prebuilt planets).
They start with some guaranteed 11x buy ports that are within their galaxy but close to the warp, designed to try to promote raiding (who can pull this off first?), however because they only buy it makes them harder to restock and impossible to rebuild, it also heavily limits their potential for experience trading.
The in-galaxy ports can be used to stock planets to rebuild as necessary and probably to do some in-galaxy experience trading (for very little money), they can also be used for things like building new buyers which are easier to defend as they are deeper into your home territory.
All weapons should be fairly central to give no clear arming advantage to a single alliance, along with the fact that everyone should be sat on the planets so they do not need to rearm beyond the initial.