It is a staggering chart - taken from the Business Insider web site - and most newbie businesses would give their right arm for the sensational growth of users that Twitter has achieved! It is also testimony to the importance of network economies of scale. But can Twitter monetise the content from their ever-expanding army of users?

There are moves afoot! Today we learn that Twitter has reached an agreement with 16 partner sites including YouTube, Yahoo! and Flickr to embed content on its site, make their content stickier and make the site more appealing to potential advertisers.

I am a huge fan of Twitter - there are great opportunities for students and teachers to use it as a learning tool and I will blog about this a little later on in the term