Relatedly, just today Fedora Commons and DSpace have announced a
project called "DuraSpace":

'''Over the next six months funding from the planning grant will allow
the organizations to jointly specify and design "DuraSpace," a new
web-based service that will allow institutions to easily distribute
content to multiple storage providers, both "cloud-based" and
institution-based.  The idea behind DuraSpace is to provide a trusted,
value-added service layer to augment the capabilities of generic
storage providers by making stored digital content more durable,
manageable, accessible and sharable.'''

Full press release here:
  http://www.dspace.org/index.php?option=com_content&task=blogcategory&id=74&Itemid=175

Keith