Julia Margaret Cameron @ The Met

Through September 2008 on view at The Metropolitan Museum of Art in New York is an exhibit titled "Framing a Century", curated by Malcolm Daniel, including works by Julia Margaret Cameron, Brassai, William Henry Fox Talbot, Roger Fenton and more.
You can read a review of the show by Roberta Smith titled "Aristocracy of Talent for an Egalitarian Art" for the New York Times here and see a Times slide show of some of the works here.