BBC news has a prototype website for applying tags to news stories.
Just click on a news story and you will see on the right the tags for the story and stories that share these tags.
“Users have their own tags page to aggregate bookmarked stories, and they can also view a global tags page showing the most popular and recent tags used by all users. There is also a tag search facility across a users’ tags or the whole tag space. For each ‘tag’, users can see their own stories and other peoples’ stories that have been associated with a term, plus there are feeds from Del.icio.us, Technorati and Flickr that pull in content with similar tags.”