Spotify: Browsing and Subscribing to Playlists

I have a Spotify Premium subscription. I'm using the IPhone app, as well as the desktop client with Internet Explorer 9, Jaws 14, Windows Vista, and the SpotifyBlind scripts for Jaws. I can search for and play tracks on Spotify, play the radio stations, and play my own playlists. But I haven't found a way to browse and/or subscribe to playlists that don't already belong to my Facebook friends. Does anyone know of a way to do this? I tried the sharemyplaylists .com IPhone app, but it's not appearing very accessible at the moment. Nothing happens when I double tap the play buttons. Then when I use the sharemyplaylists website and choose a playlist, it just takes me into the Spotify desktop client, and then I can't locate the playlist in the Spotify client to play it. Any tips on this, or on simplifying searching and browsing from the desktop app are greatly appreciated!