StokeBloke.com

I also found this tutorial. It appears to be for an old version of Blender, but it explains how to get the radiosity to work in Blender.

The tutorial is available at http://blenderman.free.fr/tut/radiosity/uk/

I managed to get this

Also you may want to read about general radiosity at http://en.wikipedia.org/wiki/Radiosity

Well I finally got round to using blender more.

I just finished my first new render using blender and yafray.

see Lego Tanker Render

Its actually a model I created in CoCreate OneSpace Modeling as part of my daily job, which was imported via STL into blender using the Batch STL script.