In all honesty, Apple really should purchase this app and replace its music app with it. The use of touch gestures makes the whole music experience on a touchscreen seem more natural and current. Lastfm syncing is flawless, transitions and graphics are fluid and best of all it uses your existing library on the phone so no streaming--dont get me wrong, spotify & iTunes Match are great but they dont have every track I want to listen to. Sticking with my iPod/Music for my own collection of music. If youre the same way, download this app. (Oh, and it also works with songs in the Cloud/iTunes Match)
Jesse Burns about SmartPlayer - Music Player and Scrobbler for Last.fm