The following has been added to the Zotero Group for Ancient World Open Bibliographies and the Ancient World Open Bibliographies Wiki.
Jan Theo Bakker, Phd Leiden
Last updated 9/23/2012.
This bibliography of 2370 items includes articles and monographs in multiple languages. For works that discuss multiple sites, there are helpful notes indicating the pages that concern Ostia. It can be browsed by keyword (a page-long list of keywords runs from Architecture to Water Supply), author, or decade.
Ostia in Pleiades: http://pleiades.stoa.org/places/422995