Titled Image Gate, I can see this site becoming insanely useful as a research tool. From their site:
Image Gate is The New York Public Library’s first full-size working version of its new digital image database. Image Gate provides free and open online access to thousands of digital images from the collections of NYPL’s four research libraries: the Humanities and Social Sciences Library, The New York Public Library for the Performing Arts, the Schomburg Center for Research in Black Culture, and the Science, Industry and Business Library.