The official project page for the merge of WIMA into IMSLP. See also the official forum announcement. As of July 21, 2012, this project is officially complete.
Christian Mondrup, the caretaker of the Werner Icking Music Archive, contacted IMSLP in August 2011 with a proposal to merge WIMA's entire collection of files into IMSLP in order to remove the dependence on the site from Mondrup himself. After more than two weeks of discussions, an agreement to proceed was finally reached.
Uploading was completed on 21 July 2012.