I learn from Chicago Public Radio, via Rare Books News, that the Newberry Library and the Spertus Institute have jointly acquired a copy of the 1481 edition of Nicholas of Lyra's Postilla Litteralis super totam Bibliam . More information here. According to the press release, there are only 3 known copies in the U.S. In Pittsburgh, the earliest editions of Nicholas' Postilla can be found in this 1508 Basel printing at Pittsburgh Theological Seminary and a 1588 Venice printing at Duquesne's Hailperin collection.
Meanwhile, I learn from this article in Haaretz that Hebrew and Arabic books from the Jewish National and University Library in Jerusalem will be included in Worldcat.