Also, later this year (31 May), see Neil Corcoran's Shakespeare and the Modern Poet. New York: Cambridge University Press, 2010. I mention this, as there is a chapter on Plath, as one might expect, "Survivor of Cease: Shakespeare and Sylvia Plath in Ted Hughes's Poems."
Luke Ferretter and Nephie Christodoulides have published articles in Woolf Editing/Editing Woolf: Selected Papers from the Eighteenth Annual Conference on Virginia Woolf: University of Denver, Denver, Colorado, 19-22 June, 2008. Clemson, SC: Clemson University Digital Press, 2009, edited by Eleanor McNees and Sara Veglahn. See Nephie's essay "On Not Being Able to Paint: Writing Inhibitions and Self-Editing in Virginia Woolf's and Sylvia Plath's Fiction" and see Luke's essay "'The Influence of Somebody upon Something': To the Lighthouse in Sylvia Plath's Work." You can order a copy for $22.95. I'm not sure if there are any other papers dealing with Plath in this publication, but will report back once I receive my copy.
I also found, recently, an article by Steven Gould Axelrod in the book Alienation, which is in Bloom's Literary Criticism series. See pages 11-20 to read "Alienation and Renewal in Sylvia Plath's The Bell Jar."
John Barber from the Globe and Mail published "Fine Writers, Lousy Spouses" on Wednesday.
Please note that ladylazarus.tv has been updated with a slideshow and movie.
It certainly seems as though there is, suddenly, a lot to look forward to this year!