I have been hearing rumors of the discoveries of some previously unknown sermons of St. Augustine over in Vienna, so I emailed one of my professors I had at Notre Dame, John Cavadini. He did some hunting around and eventually wrote back to me a few days later, "You were right! --jc".
This is very exciting news, indeed! Included in the email were a few links in Austrian (At least, I think the links are in Austrian . . . it might be German) from a professor Dorothea Weber who teaches at Oesterreichische Akademie der Wissenschaften . I could only pick out a word or two here and there from the site that is reporting the news. Here is the link to the press release. Here is a link to the Bibliotecha site that copies some of the press release.
Here is a link to a google translation from German to English of the press realease page. I can't vouch for the accuracy of the translation.