I thought all you airheads might enjoy this article on biplanes. Not all are from WW I, but a few are (in the photo gallery about half way down the page)

This magazine is really good if you're at all interested in aviation. I've been a subscriber for about 20 years. It covers everything related to air and space (thus the name).

http://www.airspacemag.com/history-of-flight/Biplanes-and-Us.html

The two S.E.5a replicas flying over Masterton, New Zealand, are part of the collection managed by Lord of the Rings director Peter Jackson, whose 1914-1918 Aviation Heritage Trust employs 68 craftspeople who have restored or recreated 13 types of World War I aircraft.