Spotify for iOS (iPhone, iPad and iPod Touch) has been updated to version 0.6.0, and comes with a redesigned interface as well as some bug fixes.
Spotify now features a sidebar, similar to the Facebook app (and already in the Android version). Swipe the screen to see a menu with What’s New, Radio, Playlists, Inbox, Friends and Settings. There’s also an always present Now Playing bar, so wherever you are in the app you can see what’s playing, and change songs by swiping it.
Other notable fixes are the lock screen, which will now display the right track, and Shuffle will now automatically shut off after you’ve used it for an album or playlist.