First, thanks for a great application! Until Infuse I've had to keep a separate XBMC hockey puck in addition to my ATV just to read my local media collection, or Airplay from my laptop. I've since recommended this to several other people, all of whom love it.
My suggestion is why not make this app available for Mac OSX and Linux? It seems like the code is mostly in place and it would be a minor addition to make it available on Mac OSX App Store and Ubuntu/Red Hat.