Big news for publishers in the Google News index. Inbal from Google announced in a Google News Help thread that in six months, Google will stop supporting the old News Sitemaps format and require you to switch over to the new format.

Inbal said:

The new format looks like this:

<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
        xmlns:n="http://www.google.com/schemas/sitemap-news/0.9">
  <url>
    <loc>http://www.example.org/business/article55.html</loc>
    <n:news>
      <n:publication>
        <n:name>The Example Times</n:name>
        <n:language>en</n:language>
      </n:publication>
      <n:access>subscription</n:access>
      <n:genres>pressrelease, blog</n:genres>
      <n:publication_date>2008-12-23</n:publication_date>
      <n:title>Companies A, B in Merger Talks</n:title>
      <n:keywords>business, merger, acquisition, A, B</n:keywords>
      <n:stock_tickers>NASDAQ:A, NASDAQ:B</n:stock_tickers>
    </n:news>
  </url>
</urlset>

For more details on this new sitemap format over here.

Again, you have six months to make this change, but the sooner you do it, the better. ALso, there is a learning benefit to the new sitemap file. Any questions, join the forum.

Forum discussion at Google News Help.

Update: The Google News blog just added more information about this important update.