Craig just tossed this out for FUBAR:
Choice Actions Effect
Move One An infantry unit can move 6”, a vehicle possibly further.
Shoot One The Unit can fire at an enemy, see Ranged Combat.
Fight One The Unit can carry on with close combat against an enemy that is already in close combat with it.
Assault Two The Unit can move up to an enemy and engage in Close Combat.
Run Two The Unit can make a double move.
Aimed Fire Two The Unit can fire at an enemy with a ranged combat bonus of +1.
Disengage Two The Unit can withdraw from close combat one move (i.e. 6” for infantry).
Overwatch Two The Unit reserves its action until later in the turn, when it can then fire at an enemy.
Counter-attack Two The Unit reserves its action until later in the turn when it is assaulted by an enemy. Counter-attacking denies the assault its assault bonus.
Sorry about the formatting issues up there. Anyway, this is a nice step in the direction of getting the activation system. I'll play around with them some and get them into my Liberty FUBAR 15mm set. I'm assuming that vehicles follow these rules as well with a shoot activation allowing an AFV to fire off all of its weapons unless the unit has a special rule for that.
Looks like some cool stuff that I'll have to try out with my next game.