Mind42.com | Social media kitbag | Scoop.it
I reckon this could be useful for collaboration around stories and for newsgathering. I've just signed up and had a play. You can add notes, articles, links. Might be useful for researching a story.

If you have experience using it for journalism, please add your comments below.

From the site's blurb "Mind42 is a free online mindmap collaboration tool. You can easily share and develop your ideas with your friends."