From Roland Smeenk, "Attached you will find an improved Collada plugin to properly support camera's.

A Collada camera will be added to the scenegraph as osg::CameraView. This allows the user to create a set of predefined camera viewpoints. I also added a new MatrixManipulator to osgGA called CameraViewSwitchManipulator and added usage of this to the osgviewer example. This manipulator allows switching between the predefined camera viewpoints. The current design limition I ran into is that a MatrixManipulator only manipulates the ViewMatrix, but for this particular  manipulator I also want to update the projectionMatrix of the camera when switching to a new viewpoint. This is not implemented because I don't know what would be the best way to design it. Any ideas?
 
Furthermore Collada also supports orthographic camera's, where an osg::CameraView only supports a perspective camera. Would it be useful to create a CameraView with customizable optics for this?"

include/osgGA/CameraViewSwitchManipulator

@@ -0,0 +1,79 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield 
+ *
+ * This library is open source and may be redistributed and/or modified under  
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
+ * OpenSceneGraph Public License for more details.
+*/
+
+#ifndef OSGGA_VIEWLISTMANIPULATOR
+#define OSGGA_VIEWLISTMANIPULATOR 1
+
+#include <osgGA/MatrixManipulator>
+#include <osg/Quat>
+#include <osg/CameraView>
+
+namespace osgGA{
+
+class OSGGA_EXPORT CameraViewSwitchManipulator : public MatrixManipulator
+{
+    public:
+        CameraViewSwitchManipulator() {}
+
+        virtual const char* className() const { return "CameraViewSwitcher"; }
+
+        /** set the position of the matrix manipulator using a 4x4 Matrix.*/
+        virtual void setByMatrix(const osg::Matrixd& matrix) {}
+
+        /** set the position of the matrix manipulator using a 4x4 Matrix.*/
+        virtual void setByInverseMatrix(const osg::Matrixd& matrix) {}
+
+        /** get the position of the manipulator as 4x4 Matrix.*/
+        virtual osg::Matrixd getMatrix() const;
+
+        /** get the position of the manipulator as a inverse matrix of the manipulator, typically used as a model view matrix.*/
+        virtual osg::Matrixd getInverseMatrix() const;
+
+
+        /** Attach a node to the manipulator. 
+            Automatically detaches previously attached node.
+            setNode(NULL) detaches previously nodes.
+            Is ignored by manipulators which do not require a reference model.*/
+        virtual void setNode(osg::Node*);
+
+        /** Return node if attached.*/
+        virtual const osg::Node* getNode() const { return _node.get();}
+
+        /** Return node if attached.*/
+        virtual osg::Node* getNode() { return _node.get();}
+        
+        /** Start/restart the manipulator.*/
+        virtual void init(const GUIEventAdapter& ea,GUIActionAdapter& us) { _currentView = 0; }
+
+        /** handle events, return true if handled, false otherwise.*/
+        virtual bool handle(const GUIEventAdapter& ea,GUIActionAdapter& us);
+
+        /** Get the keyboard and mouse usage of this manipulator.*/
+        virtual void getUsage(osg::ApplicationUsage& usage) const;
+
+       typedef std::vector< osg::ref_ptr<osg::CameraView> > CameraViewList;
+
+    protected:
+
+        virtual ~CameraViewSwitchManipulator() {}
+
+       osg::ref_ptr<osg::Node>       _node;
+
+       CameraViewList _cameraViews;
+       unsigned int _currentView;
+};
+
+}
+
+#endif
+