I recently posted on Hokkaido and talked a bit about the Sapporo Snow Festival with a bit about what it was. Here is a blog post by someone that took a few snapshots of the prep work for it. Please visit the site and look through all the images.
http://thiessentwosomejapan.blogspot.com/2009/02/makings-of-snow-festival.html
Here are a couple interesting ones.


Again please visit http://thiessentwosomejapan.blogspot.com/ for more images.
I hope to go to Japan someday to be able to bring you some of these cool pics.