Diaspora is coming along nicely. After an evening's playtest of ship combat we managed to refine the ship construction system. Now we have three design systems -- ships, weapons, and armour -- that use a unified and very simple system. So things are designed in similar fashion and therefore described in a similar fashion and therefore function (as a game mechanism) similarly. The missing level of scale is vehicles, which we weren't going to bother with but now intrigue me.
Almost at the point now where we need to start writing real game text.