MusicPD is a server daemon for playing music. You can have a server attached to your stereo system, and clients can connect to the server and see what's playing, add songs, and browse the library of music. Sonata is my favorite mpd client because it has an intuitive interface and supports advanced features like streaming radio stations, playlists, and audioscrobbler.

Main Features:

• Configure multiple mpd server profiles and easily switch servers
• Browse music library by file, artist, genre, or search for what you want to listen to
• Supports playlists, streaming radio stations, and song info with lyrics
• UI customized for Nokia Tablets including finger-friendly buttons, a built-in menu, and way less right-clicking than the desktop version (although tap-and-hold is supported)

I've hildonized Sonata and packaged it up, so you can now download Sonata from the Extras repository. It's under the Multimedia category.

or, try the Diablo one-click install

Please do not contact the original author of Sonata with bug reports. I will be setting up a Maemo Garage page for this port, and that's the place to report problems or start fixing the last little ui issues.