If Lucasarts was going to release an editor for this game they would have done it a LONG time ago. There isn't going to be anything more on Focom from LA. It's a shame - though the game had alot of faults that turned people (and reviewers) off, I think the game concept had incredible potential. Where else can you command AT-ATs in full 3D? If Focom had been as good as say, Ground Control, I think Focom would have a HUGE following.
As said many times, an editor might have been too difficult because all of the enemy AI and movements is scripted.
And yes I still play. I'm on the Endor mission with the original trilogy cast and getting my butt kicked - I still haven't finished all the missions.