not directly archaeological, but on the one hand this kind of archive (or museum) always underlines for me how little we actually do and/or can know about the people(s) we excavate: always humbling...
on the other hand, this "Unison's Memory of the World programme" is something new to me, but looks like a very interesting development, since it seems to be granting "world heritage status" to archives and collections:
http://news.bbc.co.uk/2/hi/europe/7085430.stm