So I was on the bus today, and noticed someone was flipping through something on his iPhone. Turned out it was his playlists. And once he picked a song, I could easily see which album it was from, because of the album cover (easy to recognize because I too have some Vampire Weekend on my iPhone).
To me that’s just as valid a music sharing experience as whatever the Zune is supposed to do. And we didn’t even have to cooperate.