So a break down of my opinion of the work thus far:
Let's start with the hole: Great compromise. I like the hexagon-in-a-disc look. As I mentioned on IRC, this gives me the feeling that the hexagon can be rotated to serve multiple functionalities. There is some 'bubbleage' that appears to be in place in this shot:
http://imagebin.org/131553, but I'm not sure that isnt due to a shading illusion made by that shot, as the other shot makes it look perfect. So spot on job here.
Next is the command towers (north and south pole): We cannot really see the south pole tower, so I will make no comment. The North tower looks good. It is pretty busy at the top, and that's a good thing, as that I imagine to be some sort of command tower with good visibility, while the shaft leading up to the "head" of the tower is more there for travel purposes. The tower illustrates that well.
The 'beak' portion (Opposite the platform): The beak features a lot of inset greebles. I think these greebles look good on their own, but they do tend to "de-volumize" the space station, in the sense that this is a structure that I anticipate having a large amount of space inside its massive hull, but these insets tend to take away from the perception of space. This is minor, however, and if they stayed it would by no means ruin the model for me. Just something to consider.
Overall great job, and thanks.
