The Malletech Grand 5.0 octave marimba -- it's a beautiful instrument. This 3D model was created using AC3D and then exported to VRML to enabled viewing within a web browser. If you have a VRML Browser plug-in installed then you can download the geometry below and view the instrument in 3D glory.
Or, if you're a 3D graphics nut then you can download the original AC3D files and supporting texture images.