Hi Stevie,
It looks very good. For my money, "You can upload your photographs of public domain works, such as old buildings, statues, and art." (page 3) is a little ambiguous (the old applies to all three, but this is not 100% clear) though I cannot think of anything better.
The only other thing I would question is the use of the term "public domain" without a clear nod to the fact that the copyright sense of the term is not the same as the general usage. In particular, perhaps the reference to the public domain on page 3 could be qualified with the word "copyright" to avoid confusion. On page 11 and the glossary, one could do the same, or tweak the sentence there to read "In copyright terms, a work is said to be in the public domain if is not covered by anyone’s copyright." I've seen this confusion a lot myself, so i think it would be worth it, but others may disagree.
Remember the back page still needs a URL! :)
In general, I think it's great though.
Harry
-- Harry Burt