Georg Niedermeier (sad) created the above image with Cinema4D R8.2. His c4d-file is available at the download section. Rendering time with this settings was 3:51 minutes on Athlon XP1800+.
I am very curious what other global illumination renderers are doing with this test case. I would be very pleased if someone could render it with Mental Ray, Brazil, etc. and send me the results. Visit the Download Section and get the scene file in various formats for importing it into your favourite renderer.
Another comparison with this test scene can be found at www.buildart.com/render_comparison.htm.
Currently it shows renderings of Truespace, Bryce, Art*lantis and Archicad with AV-Works.