Nate what would you like to know. The Revo system is fantastic I use it with battery power in all of my "G" gauge locomotives and I plan on using it in my "O" scale stuff as well. Once you buy the initial kit that includes the hand held controller, receiver, smoke generator, and linking switch then you're set, after that you only need to buy additional receivers for your locomotives. The current receiver will fit in most "O" scale locomotives, but I can't tell you when the smaller units will be available. They also have a receiver that will control your switches which I will be using on my "O" scale layout which is still in the design faze.
Right now Aristo-Craft is waiting for the new receivers with sound before anything else is released or instock. You can now buy any of Aristo-Craft products direct from them on their web site at a 40% discount which use to be my dealer discount but I guess I'm out of the loop now.
Hope this helps Nate.
Chuck