Christian Lassmann from Weltenbauer Software Entwicklung GmbH, who I had the pleasure of meeting at the Unite Conference in Denmark in October, just wrote to tell me that "My Animal Center", a game built with Unity3D's Wii Edition and Mono hit the shelves on December 20th in Germany.
The game uses C# extensively. It was a joy to hear Christian explain how the various effects were created, I wish he blogged about it.
Cute trailer (text is in German):
The game is coming to a Wii near you in the US soon.