The "New Review of Academic Librarianship" has a themed issued each year. Vol. 21 (2), (2015) is E Is for Eclectic: Special Collections in a Digital Age, Guest Editors Margaret Haines and Wayne Jones, Carleton University Library, Ontario, Canada.
The formal call for papers will be going out in September. If people wish to express an early interest they should contact Maggie Haines (email@example.com).