It is HA/Graphical software that allows you to control devices, etc. It's strength is its ability to build nice graphical touch screen interfaces. When you get to the point of needing some software like that, you should look at several of the popular packages - Mainlobby and Charmed Chark (CQC) for touch screen interfaces and automation, then there are of course many others like Powerhome, Homeseer, etc (see the software thread).
Do you have a 'grand plan' for automation, or are just looking at automating lighting for now?
Sorry I can't help on the RadioRA stuff, I am not a fan of wireless.