Here are some of the first results of my implementation of SSAO plus one bounce of indirect light in the Crystal Space engine.
In the photo gallery you can see three pictures of the famous dragon model from the Stanford repository in the Sponza Atrium scene. The first one is rendered with ambient occlusion and one bounce of indirect light, the second one is without ambient occlusion, and the third one is with ambient occlusion only.
The sponza scene with stanford models was exported to crystal space format by Ollie Brown in the context of Summer of Code 2009. You can find it here.