T3 - Tech 100

The fresh-faced founder is being taken very seriously for his university creation, though had some trouble earlier this year over privacy settings.

Sure, we all abandoned Facebook for Twitter, but there’s now over 200 million registered users, making Facebook the fifth-largest ‘country’ in the world after China, India, the US and Indonesia.

Zuckerberg may be a bit over-keen when pressing the ‘active’ button on site changes, but is on the whole quick to comment, or even reverse a function – as he did earlier this year when concerns were raised about privacy settings on Facebook.

With Twitter more of a threat than ever before, it’s up to Zuckerberg to ensure they retain their users’ affections. Being able to “tag” your friends in a status update as you can on Twitter is a nice touch, but Zuckerberg had better tread carefully if he wants to avoid comparisons to Twitter.

Acquiring hit US aggregating site FriendFeed is one way Zuckerberg is taking on Twitter. With FriendFeed collecting all the finer aspects of a user’s life (Flickr photos, blog posts, tweets, Facebook activity and more), Facebook now has a powerful aggregation tool right at its fingertips.