For those of you interested in the 3D printing side of numerical control, MIT has just released a video of a flute created using Rhino3D and an ObJet Connex500. Although not perfect, the flute is playable as is shown.

[nomedia="http://www.youtube.com/watch?v=zwHgszH0aqI"]YouTube - 3D Printed Flute[/nomedia]

Connex500 - The First Multi-Material 3D Printing System

~John