Twitter Trends

Buried in last night’s update on skyrocketing mobile usage, Twitter CEO Evan Williams revealed that the company now has more than 145 million registered users.

The last time Twitter() went on the record with member registrations, it was touting 105 million registered users. That stat came just four months ago, which makes last night’s reveal quite significant and proves that Twitter is adding nearly 300,000 new users per day, as previously disclosed.

There was plenty to talk about on Twitter this past week. Sports, holidays and entertainment dominated, with a nod to tech from the Twitterverse as well.

College football season kicked off this week in the U.S., stirring up a torrent of tweets from fans, and landing NCAA the number one spot on our trends chart.

The deposed king of Twitter() trends, Justin Bieber, made another strong showing this week as he reached the 5 million follower mark last Saturday. It’s worth noting that according to an unnamed Twitter employee, it takes a full 3% of the network’s server power just to keep those Bieber tweets flowing. Bandwidth well spent, I say.

Twitter trend by week