Hi there,
Very happy Spotify Unlimited user here.
One little idea - I'd like to be able to highlight multiple tracks in a list, and right-click to find an exacting timing for all the track durations added together. A little like the playlist length calculation in top right, but more accurate. As a classical musician I'm often interested in adding up the timings of pieces for concerts etc., and I think that'd be a cool little feature.
Thanks for the great service!
This idea has already been suggested here:
http://community.spotify.com/t5/Spotify-Ideas/Stat
Add your kudos there please! ;)