Session idea: “Unhidden” Collections: Now What?

As a recipient of one of Council on Libraries and Information Resources‘ (CLIR) Cataloging Hidden Special Collections and Archives grants, the Philadelphia Area Consortium of Special Collections Libraries‘ (PACSCL) “Hidden Collections” project has minimally processed and created finding aids (available online) for 125+ previously inaccessible collections.  While these collections are “unhidden”, there is much that we can do to make them (and all those other amazing collections out there) even more visible and usable to researchers all over the world.
Session participants could work with the goal of brainstorming a list of  potential digitization projects, web resources (either new or extensions to existing ones), mapping projects, 3d reconstructions, timelines, mobile apps, class assignments, etc. for unhidden archival collections.
PACSCL’s “Hidden Collections” has relied heavily on blog posts, Twitter and Flickr, but I would love to be involved in a discussion regarding creative and exciting ways to bring these amazing collections into the limelight!