Hi Sindre,
the Android app has come a long ways since the early releases, and it's almost perfect, though there is one little feature that I'm dearly missing that's available in many other audio playback programs, and that's audio ducking as described here:
http://developer.android.com/training/m ... focus.html
Currently, when subsonic is playing music and a notification sounds, the notification sound completely replaces the playing music. In comparison, when streaming Pandora radio, when a notification sounds, Pandora teporarily lowers it's volume, but doesn't disrupt the music playback. Once the notification sound is over, the volume is raised back up to regular level. This also works very well with Google Maps Navigation, where the volume is lowered while the navigation program speaks the directions, and then the volume is restored again. The navigation use case is particularly important to me. Subsonic seems to completely ignore the loss of audio focus during the spoken navigation instructions, and continues playing music at full volume. Consequently it's often very difficult to hear the instructions over the music. I've resorted to using Pandora or Google Play while using Google Maps Naviagation, but it would be great if this capability was added to Subsonic as well.