We're making S.A.D. easy to program, and not easy to modify.  However, we are releasing the source code under GPL.  Reminding everyone that the idea of S.A.D. is using a single unit with a single purpose, do you have a version of S.A.D. you would make if you could? 

For me, I would create either a Star Trek S.A.D. or a Starcraft S.A.D. if I had the chance.