Has Twitter peaked?

It was the upstart rock star of the Internet in early 2009, roaring out of relative obscurity to become one of the most exposed — some would say overexposed — services on the Web.

But since the middle of last year, the number of Twitter users has flatlined.

Compete, a Web analytics firm, says the microblogging site's number of visitors hasn't changed much since June and that its roughly 22 million visitors in December was about 770,000 fewer than its highest number, which was in August.

via Has Twitter peaked? – CNN.com.