Nice job. I like it a lot. That dithering is incredibly subtle. I'm downloadin' for a closer look. Something bothers me about some of the black lines, though, especially the one with the white highlight to the left of it.
Also, this made me think of pixelfreak.com (whose splash page was an iso of a house being demolished by a backhoe), so I stopped by to see if there was any new stuff, and wow! Totally new, many great pixels, and a cool iso tutorial to boot.