PwnPlayer for iPhone

PwnPlayer for iPhone. This app is a MobileMusic Player/iTunes Replacement for Jailbroken iPhones. It allows the user to play back music from a directory on the iPhone, search through music libraries, and more.

PwnPlayer Features
+ Plays from the file directory. Just throw your music in to a directory on your iPhone via sftp or iphonebrowser and PwnPlayer will recognize it and allow playback. No more syncing with iTunes to add music! This feature also allows playback of music downloaded via iSoulSeek.
+ Music Library compatibility allowing you to use both the current iPod app and PwnPlayer.
+ Search for music. You can search your music for the song/artist/album you are looking for.
+ Lock-Screen gesture controls to allow you to control PwnPlayer while your iPhone remains locked.
+ CoverFlow. Just like coverflow in the current iPod app there is a coverflow option in PwnPlayer. At the moment it only works with music in your iTunes library.
+ PwnPlayer runs in the background so you can do other things while listening to music.
+ SpringBoard integration allows you to see see current song info on the lock screen and also allows for the lock screen music controls.
+ Playlist managing allows you to create and manage your playlists.

Future releases of PwnPlayer will also include more features like Plug-ins, Video playback, possible genius support, and syncing with the iPhone's music library if the security checksums are cracked. (source)