I know this is a little late, but I think I found the website you were asking about....
Hopefully this link works...
http://www.ukiyo-e.se
Even if it is not the exact site you were talking about, it is still pretty fantastic! And I am so happy that you posted this thread and I decided to read it....it made me go back through my notes to find that website, which I want to use for my Japan unit in grade seven history this coming school year to show more about Japanese artwork and various time periods. I now want to search for more of the websites that I wrote down during the seminar, as well as the sites in our binders, for more resources to enrich my curriculum.