Amanda Marcotte spoke about feminism at Skepticon 3, and the recorded talk is on youtube (click her name). I found the New York Times Article that she mentioned in her talk concerning the women who go around preaching to other women about being submissive. Marcotte is the author of It's a Jungle Out There: The Feminist Survival Guide to Politically Inhospitable Environments. Haven't read it, if anyone has let me know how it is.
James Randi's talk is also available, very funny, and very inspiring to see him still giving lectures. Randi is the author of the wonderful book Flim-Flam! Psychics, ESP, Unicorns, and Other Delusions as well as The Faith Healers.
Last, but most certainly not least, is Joe Nickell's lecture. Nickell's lecture was one of the crowning jewels of the event; a fascinating look at some of his investigations. Joe Nickell is the author of Looking for a Miracle: Weeping Icons, Relics, Stigmata, Visions & Healing Cures. I've referenced his work several times, such as in the article on miracles I wrote for DB Skeptic.