I am looking for an Android Audio Player that is based on a "now playing" playlist, like Amarok, Winamp or WMP. In relation with that playlist, I want buttons to add a song as the next song, or to add the song to the end of the playlist. Like the Rockbox firmware does it. Is there any app out there that works like this? I don't need any advanced features like lyrics, covers, etc, I just want to listen to music. In case there's nothing around, I'll even consider developing my own. Who needs synched lyrics if there's not even an "add next" option??!