Here's one from the Getty

Some of you DPR guys may remember this one... This was one of the first imagess where I did the post processing myself. I took this image to prove to a friend that I could use the Nikkor 12-24 at 12mm and still get straight lines. They are not perfect, but straight enough to win the bet...

 

Hi Paul,
I have not tried the 12-24 on my D2X yet, work has had me stuck in the studio since early Feb.

But on my D100 I've used it quite a bit. Here's my take:

Sharpness: edge to edge @f/8 or f/10 it's the sharpest lens I've used in this focal range. In my opinion its better than the 18 f/2.8 and 24 f/2.8 at any apeture they share.

CA: is noticable at 12mm, but not so much that it ruins photo (or cannot be easily corrected in PS)

Vignetting: Even my slimmest filters will vingette at 12mm

As far as architecture goes, you have to be very careful with the lens in order to keep lines from becoming distorted. I used the "auto gridlines" in the D100 to help me keep things straight, I assume I could do the same with the "type e" screen in the D2X and get good results (probably better since my D2X seems to do everything better than my D100).