Illumination looks nice, but what is that grey solid shape in the mirror ball?
I would also try to use the cache at some point, Brecht just commited the first improvement towards it in more than a month today so you might want to try the next render25 build that comes around for your system.
The grey block is the background color of the scene. It should be black, by the way but I forgot to change it. Im trying som architectural test and it looks great.
Ace Dragon, what is the cache you are referring to? another method for GI?