To all the people who can use Spotify on their iPhone, here’s an interesting update for the official mobile client, that hits version 0.4. Here’s the changelog:

• Last.fm scrobbling.

• The ability to open and play Spotify links e.g. straight from your Facebook app or browser.

• Save time and space by using tracks already stored on your iPod in your playlists - there’s no need to sync those track anymore.

• Save and find your favourite tracks and albums with the - Starred playlist and Star buttons (also coming to the desktop version soon!).

• The ability to sync your purchased Spotify tracks over Wifi.

• A new look for albums and playlists.

• The ability to set playlist as collaborative or not.

• The ability to search in playlists.

• The ability to create a new playlist from the Add to Playlist view.

• Playlists named “-” show up as separators.

• Support for listening at 96 kb/s for more efficient streaming on slow connections.

• Spotify remembers when you were when you quit and starts up at the same location.

• Album reviews added to album view.

• Volume slider uses system volume.

• Volume normalization option added

Spotify is rumored to be “released” in the US later this year, but there’s no official word about it yet. If you’re still wondering, it’s a great service.