faaaab's dashboard

Well it depend, if it has to create new metadata fields there is a compatibility problem I guess. But that's not how I see the things. For me, you would tag your song genre like this : "classical, soundtrack, movie, 80s" and that's how would the other mediaplayer see it but intelligent songbird would parse the string and see the four different genres as separate.
In fact I think it's just a regular panel filter view with a string parser to distinguish multiple genre separed with commas in a single field (well said like this it seems simple but I'm sure it's not that simple)