Is this table in the wiki?
LinuxICE uses the bluez stack for bluetooth, nGhost for media playback(mplayer/phonon powered). It is ipod compatible (reads the mp3 files from the drive). Zune also if it shows up as a normal drive like the ipod does. File syncing is handled by a proximity rsync setting. GPS via Navit. OBDII via nCarInfo and obdgpslogger. App store, sure! We have a free app repository. Multiple monitors yes, but you'll have to hack to get it setup.
EDIT: I found a stub in the wiki for a frontend comparison.
I had created a fancy table with info in the old wiki, i don't know what happened to it though .