Another (slightly trickier) URL hack. Bookmark this google news bookmark in Moz, and give it a shortcut (as in the last entry) – say “gn”. Now, if you’re at a news article, and you want to see what other news sources have to say about it, just replace the “http://” bit of the URL with “gn “, hit return, and Google News will spew out the cluster of news stories that are similiar to your news article. So, if you were at “http://news.bbc.co.uk/1/hi/world/middle_east/2568223.stm”, a news story about Yemen, change the URL to “gn news.bbc.co.uk/1/hi/world/middle_east/2568223.stm” would take you to http://news.google.com/news?num=30&hl=en&ie=UTF-8&q=cluster:news.bbc.co.uk/1/hi/world/middle_east/2568223.stm which is the index page for all the news stories Google knows about this topic.
This could probably do with turning into a platform-independent bookmarklet. Any volunteers?