You can now listen online for free to the talks from Desiring God's 2004 national conference, Sex and the Supremacy of Christ. You can hear John Piper give two talks on "Sex and the Supremacy of Christ," Ben Patterson on the Goodness of Sex and the Glory of God, Al Mohler on Gay Marriage, Mark Dever on the Puritans and Sex, David Powlison on Sexual Brokeness, C.J. Mahaney addressing married men, Carolyn Mahaney addressing married women, Mark Dever and his associates addressing single men, and Carolyn McCulley addressing single women.
I'm currently editing the talks for a book by the same name, which should be published by Crossway Books in the Spring of 2005.