According to a published report Twitter hits half a billion tweets a day. Twitter CEO Dick Costolo told a London audience, microblogging service Twitter is now processing half a billion tweets a day.

According to V3 Dick Costolo was speaking at  Internet Advertising Bureau’s Engage conference in London and said that tweets have reached had a billion form 400 million when last recorded, he also confirmed that Twitter is working on the “like” and star buttons to replace the favorite button.

Source: cnet