STM, the Federation of European Publishers, and 23 other organizations have signed a "Memorandum of Understanding on Diligent Search Guidelines for Orphan Works." The text of the document does not appear to be available; however, the press release seems to reference the 2006 "STM Position: The Use of Orphan Works."
Here's an excerpt from the press release:
The Memorandum is an outcome of extensive discussions of the High Level Expert Group on Digital libraries set up by Commissioner Reding as part of the EU i2010 initiatives. It covers a broad range of copyright sectors, including the text sector, and has incorporated the previous STM work on orphan works (REF).
The memorandum is one of several outcomes agreed by all participants in the Copyright SubGroup of the High Level Expert Group and reflects the leadership of its Chair Tarja Koskinen-Olsson, Honorary President of IFRRO and the input of its members, especially Anne Bergman-Tahon of the Federation of European Publishers.