I remember seeing this on Brickshelf a while back and just being blown away. I pored over each picture, marveling at how you got the edges of the different floors and the roof to mesh so well with the curved walls.
Just came over from the pics of the interior and can i just say that this thing is AMAZING! The detail that stands out the best to me here is the gravel roof. Strange, I know, but wow... Nice work! ~ Chris.