I'm currently a Rhapsody Premium customer. On my sonos setup, using Rhapsody, I can search and listen to music, by artist, album, genre, etc. AND Rhapsody gives me 100's of predefined playlists that I can choose from (I'm an old bugger and these playlists MAKE me listen to stuff I've never heard before).
What does Spotify offer in terms of predefined playlists for Sonos users.
Nothing for Sonos specifically. However you can subscribe to spotify playlists by other means - friend's lists or others you find through sites like sharemyplaylists.com - and these will show up when browsing your lists in the Sonos controller
---------------- Listening on Windows, Android and Sonos. Tweeting it at @davelicence