This looks very obvious in hindsight, but I am sure not many would have thought about this. This guy uses the HL's source engine to produced a model of the Kaufmann House by Frank Lloyd Wright. Using the Source Engine, as opposed to more traditional Architectural Software, allows the use of dynamic lighting and a real-time walkthrough of the scene in high resolution.
I was out of Bangalore (had to go to Delhi) from 12th to 17th Jan and I did not have access to net at that time. I noticed that Delhi is still an iPod free city and it really is cold there