doubleTwist Corp has released a polished audio and music player app for Android called doubleTwist player. The player seamlessly integrates with the doubleTwist desktop client running both on OS X and Windows computers. As you may already know, doubleTwist desktop client can be used to import and sync your iTunes music and playlists into your Android handset. The latest version of the client integrates also with Android market. I have been using doubleTwist for a while now, and I have been quite happy with it.
Get the player app while it is still free from here. The player will be enhanced with new features and widgets in future.