For dotAC we needed to get publication metadata for the UK. So we used OAI-PMH to get the XML OAI metadata for the sites listed at http://roar.eprints.org/.
We have now processed these into RDF to have a Linked Data site (resolvable URIs and SPARQL endpoint plus some other things), and have made it public at http://dotac.rkbexplorer.com/.
Hopefully it may be of use to others as well.
We have also made the OAI data for the whole world available at http://oai.rkbexplorer.com/.