http://www.vimeo.com/25962261
Tutorial on BlenderDiplom: http://blenderdiplom.com/index.php?option=com_k2&view=item&id=48:tutorial-god-ray-logo-reveal-in-blender&Itemid=106
If you use this in a project, please usewww.BlenderDiplom.com for attribution!
very nice