It's a bird. It's a plane. It's Twitter!
Twitter has released data charting the number of Tweets per day (TPD). The growth has been astronomical. It's difficult to tell in the chart below, but Twitter says it had just 5,000 Tweets a day in January 2007. I remember being on Twitter back then and it was far easier to have conversations and network.
But volume grew quickly, as did the nature of Twitter. Twitter reached about 10 million TPD around July 2009 and, a year and a half later, has reached the 50 million TPD level. That averages out to about 600 Tweets per second (TPS - insert Office Space joke here).