I've been watching the Ventuz web site for a while since I had heard they were using Managed DirectX. Well they have just announced their beta and it appears to be open to all. I've just got my acceptance email so I will tell you more when I have had a chance to look. But from their website...

Overview
VENTUZ is a real-time presentation program. It translates DirectX commands into an intuitive Graphical User Interface. Ventuz is completely coded in .NET managed and runs on standard Windows XP workstations. [read more]