Viktor send us a description of the tutorials:
Since blender 2.46RC has been released I thought it might be nice to have some tutorials introducing the new features, so I made some. The first tutorial is
about the new bake feature and describes how to create normal maps from
hi-poly models which then can be used for game models for example. The other
tutorial is about lightmap generation using blender radiosity.
You can find the tutorials here.