Huddle is growing as an application for document sharing and group work, paticularly given that is free for charities and relatively low cost for others. It's a simple enough tool and very easy to use. Useful for group projects and collaboration. It links to facebook and blogs and it will be interesting to see how it compares with the various google and yahoo tools that are out there but riddled with ads! Speaking of which, if you are using Firefox, remember that you can clear the commercial clutter on your browser by installing and activating Adblock or Adblock Plus.