Last summer, Cruising the Disciplines: A Symposium on Samuel R. Delany, edited by Kenneth R. James, appeared as an issue of Annals of Scholarship. This volume was meant to be a proceedings of a symposium on Delany's work held in Buffalo about a decade ago now. I gave a paper at the symposium, which I expanded for the volume, titled "Real Mothers, a Faggot Uncle, and the Name of the Father: Samuel R. Delany's Feminist Revisions of the Story of SF." Since this paper hasn't appeared elsewhere, I've posted it on my website for those interested in reading it. At the heart of the paper is Delany's famous allusion to Jeanne Gomoll's "Open Letter to Joanna Russ" during an interview published in SF Eye in the 1990s.
You can find "Real Mothers..." at http://ltimmelduchamp.com/Narratives%20of%20sf.