Archives Wiki for Historians
I just wanted to call your attention to a new archives wiki set up by the AHA, located at http://archiveswiki.historians.org/index.php/Main_Page. They're hoping to use it for historians and other scholars to share information about specific archives. Right now, the archives listed seem pretty arbitrary (the only archives listed in the state of Minnesota is the Minnesota Historical Society), but it'll be very interesting to see where this goes.
The ArchivesNext blog has a thought-provoking post on this topic.