Came across a specific question today, regarding Google News sources. The member was asking about where Google received its sources and how someone could get their site included in the regular news results. Google scans around 4,500-5000 sites a day to gather articles to supply its results. I decided it might be helpful if I answer the questions to those with sites that publish news on a daily basis. From my experience in advising clients on submitting their site, Google is rather specific in regards to who they include in the news index. They look at how often the news is published, quality of the news releases, including the site itself. The nice thing is that Google will review all suggestions to the index.
Here is what Google has to say on it:
"Please mail your ideas for news sources to email@example.com. While we can't guarantee that we will add all sources that are recommended, we will review all the suggestions we recieve."