SFFFW
"Science Fiction and Fantasy Female Writers is a recently formed association of professional women writers of science fiction and fantasy, as well as authors from other genres who are interested in science fiction and fantasy." source
SFFFW sponsors the "Roots in Writing Award". The 2006 winner is Jane Yolen; 2005 winners were Betty Ballantine, Madeleine L'Engle, Ursula K. Le Guin, Anne McCaffrey, Andre Norton, Joanna Russ, and Kate Wilhelm.