Although it has not yet been officially announced, you will now find nearly 5000 images from Condé Nast publications available in ARTstor. This includes, perhaps most significantly, cartoons from The New Yorker (left) and fashion photography from magazines such as Vogue and Glamour.
You can read ARTstor’s original announcement of the Condé Nast collection here.
UPDATE, October 10, 2013: ARTstor has now posted its official announcement of the Condé Nast collection.