hi there, first of all: Roon rocks!
Would it not be awesome if Roon itself would pop op as a sound device where all system sound is directed to? This way I could use RAAT instead of Airplay or Songcast. Songcast stopped working on my Mac Mini and Linn seems reluctant to fix it so I am looking for alternatives now.
Using Roon I am happily streaming music to my Akurate DS, but for sound with movies I need a way to redirect system sound. Airplay can be used but RAAT is simply superior to it.
Just a thought 
cheers!
Tom