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I have been a Spotify user and a Roku owner for quite a while but now the two have paired with the Spotify Roku channel. This allows me to listen to my Spotify playlists in the living room or when I am in CA without having to bring and plugin my iPod into a dock. Granted this is probably more ideal for those of you who have nice speaker systems rather than using your built in TV speakers.
If you are a Roku user and a Spotify user go and add your Spotify channel now and start listening to your music through your living room sound system.