Totally not in the line of projects im working on now, but when that "rainy sunday" (isnt that a weird translation from Dutch?) comes I would like to start some kind of videojockey project (old hobby) The codeproject looks cewl.

This project is a live volume meter control for monitoring audio levels from a sound card. It is written entirely in C#, and uses Microsoft's Managed DirectX (June release). You can drag-and-drop the control into any Windows Forms application. You may select the input, and tweak the appearance of the animation through various parameters.
http://www.codeproject.com/cs/media/volumemeter.asp