Tweeters twitter on... and on...

Posted by Emma Woollacott

It hardly bears thinking about - there are now 50 million tweets a day, according to Twitter. That's 600 per second.

"Folks were tweeting 5,000 times a day in 2007. By 2008, that number was 300,000, and by 2009 it had grown to 2.5 million," says the company's Kevin Weil.

Apparently the number grew 1,400 percent last year to 35 million a day, and is still increasing. It still leaves Twitter trailing Facebook, though, which boasts 60 million status updates a day.

And this is simply the number of tweets created - the number of deliveries is much higher, because each one is delivered to multiple followers.

The figure doesn't even include spam.

At 140 characters per post - and let's face it, most Twitter users like to make the most of it - we reckon that's about 70 billion characters a day.

So maybe this is good news for keyboard manufacturers, as well as Twitter itself.