I found this interesting action on internet. Here are the details.
To enter the competition, all you have to do is supply us with an image that you think will stand the test of time and be be of interest to someone in 200 years time. The subject matter can be almost anything, from everyday life to global warming, changing city sky-lines to endangered species.
More info
http://www.mangiaphoto.com/win-hp-b9...er/2006/11/11/
or here
http://www.photo-i.co.uk/comps/HP%20B9180.html (source)