Pretty much all file formats now support ratings within the tags / metadata. These tags allow a user to rate songs, generally on a 1-5 scale. I would like to see Sonos add some features to support song ratings. Here is what I'd like to see:
-Ability to view rating of song currently being played (perhaps 5 light-colored stars somewhere on the display with 3 of them filled-in with a darker color for a song with a ranking of 3).
-Ability to modify song ranking using the Sonos controller when it is being played (similar to the TiVo "Thumbs Up" and "Thumbs Town" feature).
-Ability to sort by song ranking (to play your favorite songs or to play/rank ones that are not rated).
-Ability to have a playlist automatically generated based on rankings and an additional criteria (genre, artist, playlist size, etc.).
I think these features would make it easier to listen to your music collection without searching through it song by song trying to build a specific playlist. I've noticed that many computer software programs now support ratings. I've been playing around with these and really enjoy the effortless song variety it gives.