If what you said "You can only listen to Spotify tracks from within Spotify". were trueHow is it possible to sync Sotify to a IpoD? There has to be away.
That is not really true.
On an iPod Touch you can use Spotify since it has a supported Spotify application. On all other iPods, you can only use Spotify to sync local files which you already own, not any content from the Spotify online catalogue.