I have added my essay, "Editing Whitman's Poems in Periodicals," to the Periodicals section of the site. I've also slightly revised the index page for "Whitman's Poems in Periodicals," including revisions to titles of the two introductory essays and the addition of author names. In addition, I have moved the link that used to appear on the index page that linked to poems misattributed to Whitman. This link now appears at the beginning of the Bibliography of Whitman's Poems first Published in Periodicals, http://www.whitmanarchive.org/published/periodical/bibliography/index.html.
Both Susan's essay, "Introduction to Whitman's Poems in Periodicals," and mine are also now linked from Articles and Interviews about the Archive, per Ken's instruction.
I'll be continuing to update (adding new material and fixing oddities) the Periodicals section over the next couple of weeks.