Over at Current Epigraphy we're taking some steps to try to improve library holdings of epigraphic publications. We hope that we'll be joined there by other scholars and librarians, and mimic'd on other subfield blogs as well.
This was Gil Renberg's idea: a place to share notices of useful publications (print or electronic) that seem to have escaped the collections dragnet and are therefore dangerously (preservation) or disruptively (research support) underrepresented in a nation's or a region's libraries.
We're trying to use the blog medium to our advantage as well, so we're tagging relevant posts as concerned with "rare publications". This gives us a thematically browseable list, together with a corresponding web feed.
You can read more about the initiative at CurEp: "New and Rare Publications" (22 Jan 2008).