Managing Game States with OGRE
http://www.ogre3d.org/wiki/index.php/Managing_Game_States_with_OGRE
Game State Manager
http://www.ogre3d.org/wiki/index.php/Game_State_Manager
Basic Ogre Framework
http://www.ogre3d.org/wiki/index.php/Basic_Ogre_Framework
Advanced Ogre Framework
http://www.ogre3d.org/wiki/index.php/Advanced_Ogre_Framework
Creating a simple first-person camera system
http://www.ogre3d.org/wiki/index.php/Creating_a_simple_first-person_camera_system
OgreMax Scene Exporter - Table of Contents
http://www.ogremax.com/Documents/OgreMaxSceneExporter-3DSMax/
Practical Application - Something With A Bit More Meat
http://www.ogre3d.org/wiki/index.php/Practical_Application_-_Something_With_A_Bit_More_Meat
CEGUI Tutorials
http://www.cegui.org.uk/wiki/index.php/Tutorials
http://www.ogre3d.org/forums/viewtopic.php?f=2&t=52221
Ogre Articles
http://www.ogre3d.org/wiki/index.php/OgreArticles
ObjectTextDisplay
http://www.ogre3d.org/wiki/index.php/MovableTextOverlay