I've used Spotify since fall of 2008. It's hands down the most amazing music service out there. Everyone that have I've showed it to pretty much fell in love with it.<p>Until today Spotify's mobile apps have only been available to premium subs. With this you can throw out iTunes and sync with your iPhone, Android etc. Sync over Wi-fi and playlist management is way simpler than iTunes.
What's interesting is that now the mobile apps are available for free users, I'm sorry to say that they are going to lose I little of my money as this was my primary reason for paying for spotify.
Sounds great. However, it seems only music you bought, and MP3's from your own computer can be synced. As far as I see you can't sync tracks offline without buying them, as you can with the mobile apps (when you are a premium subscriber).
That would be awesome. It probably won't work because the iPod only plays music with no, or apple-only DRM. :(
Spotify seems to really focus on playlists in their marketing, but I don't see people around me using them that much. They just see Spotify as their iTunes catalogue, but just with a lot more music in it.