I've actually just moved my entire iTunes library into my ownCloud directory and let it sync to my other systems. Windows is fine with it, just point your chosen media app at the folder and it should just ignore all of iTunes' files and grab the music.
Every once in awhile I get a sync error but it never seems to affect anything and sorts itself out, going on about 8 months now with no real problems.
Every once in awhile I get a sync error but it never seems to affect anything and sorts itself out, going on about 8 months now with no real problems.