Ev Williams and Biz Stone have launched two new websites in what they hope will prompt an "evolutionary leap" in online sharing.

Biz Stone, co-founder of Twitter, is to join the <i>Huffington Post</i> as the media firm adds big names to its roster following its takeover by AOL.

So it’s finally happened — Twitter has a business model. And as with most of its moves, the result is unexpected, elegant and somewhat inscrutable.

The co-founder of Twitter warns Rupert Murdoch that his plans to charge for online content were a vain attempt to "put the genie back in the bottle".

In the final instalment of our three part chat with Twitter co-founder Biz Stone, he discusses the site’s crucial moments so far.

I met up with Twitter co-founder Biz Stone to discuss life at the company, and to find out what things are like inside the most talked-about start-up.

When President Barack Obama wasn’t concerned with swatting flies or wrestling with Congress last week, he had something else on his mind.