mountiealpha writes "The New York Public Library has digitized over 275,000 images from their colletions, and made them freely available available online. The 'NYPL Digital Gallery provides access to over 275,000 images digitized from primary sources and printed rarities in the collections of The New York Public Library, including illuminated manuscripts, historical maps, vintage posters, rare prints and photographs, illustrated books, printed ephemera, and more.'" Update: 03/04 17:30 GMT
: They're updating the site to handle high traffic volumes, but there is an informational page available
with details on the site.