I just finished reading through the Spycraft Lite download. All I can say is WOW!
Action Dice: A nice idea. I wonder how it feels during actual gameplay.
Actions: I have been saying for a long time, the actions as described in the 3e PHB were a little confusing, until read several times. Breaking it down to half and full actions only is fantasic! This is the way I like it.
Cover, Supressive, and Strafing Fire: Meat and potatoes of gun combat. I love these, and they are an excellent adaptation of firearms to d20.
Chases: Oh, yes! Great stuff.
I was not intertested in modern genre, BUT the game itself seems by far too good in quality for me to pass up.