Hi Ian
Your site is a bit of a IQ test. I eventually figured that I could navigate with the little pale squares near the bottom

.
I really enjoyed the before/after section. That's the one that really showcases your skill. Kudos! On the other hand, I couldn't figure the purpose of the three small detail images. They didn't seem to draw attention to significant areas of the main picture and clicking on them did nothing.
I wish the Images section content was part of the Retouching section, but I guess you didn't have the "before" for those.
Finally I wish the Interactive section had more detail on your contributions to those sites.
Don't get me wrong. This is a beautiful, sleek site. I only wish it made more concessions to user weakness.
Pierre