There are many new names on the list. Some are quite surprising such as Oracle, Brassring and Recruitmax who all should have been on the list earlier.
If you are unfamiliar with the HR-XML Consortium, they are publishing XML standards so that a single XML layout may apply to a large industry segment. For example, SAP and Oracle could use the exact same XML layout and send the file to Brassring or Recruitmax. There’s no such thing as a “custom interface” if these standards are in force.