I am working on a strategy game using Irrlicht and created a new camera scene node for it. Details and Descriptions in the Readme. Perhaps anyone needs something like this, too.
i forgot: the camera doen't use the mouse to be controlled (and because of this i think it is good for strategy games). so mouse events should be handled by the event receiver.
i thought it would explain itself. perhaps you should look at the First-Person-Camera included in Irrlicht - my Scene Node works like that. Differences between the two scene nodes are noticed in the readme file.