Last news on RSS feed for News on Gentoo Home page is "Gentoo accepted for Google Summer of Code 2009" on 20090321; more recent news aren't added to RSS feed in URL.
Steps to Reproduce:
There hasn't been any newsitem since then.
FYI, GLSA, latest packages, planet have all their own feeds which are used to update the front page. These will not be duplicated in the news feed.
I thought news feed reflects home page, but I was wrong.
Sorry for the inconvenience.