I just received my copy of What Comes Naturally: Miscegenation Law and the Making of Race in America by Peggy Pascoe, University of Oregon. The book recently won the Organization of American Historians' Ellis W. Hawley Prize for best book on the economy, politics, or institutions of the United States (from the Civil War to the present), and its Lawrence W. Levine Prize for best book in American cultural history.
I'm looking forward to giving the book a good read. In the meantime, Mark Kessler, Texas Woman's University, has some nice things to say about Peggy's book in his review.