I enjoyed the DesignofSignage site just because it was really interesting to look at how much information can be communicated through such simple forms. For instance, a vertical line as opposed to a slightly slanted line could distinguish male from female, or a dot, or a shape left empty versus filled in.
The Core 77 page was interesting, but kind of hard to figure it out. It was a little too much thrown at you at once and I would have liked a simpler display of some of the events/artwork that they had photographed.
Peter Callesen's page was the most interesting to me. At first I couldn't believe that he made all of those from paper. The textures and forms he created were just incredible. I was really impressed with the degree of craftsmanship and the creativity put into the medium.