VOTE: When Will Facebook Reach 600 Million Users?

Facebook seems like it could reach the 600 million user mark sometime soon. Participate in our reader poll on when this might happen.

Facebook reached the 500 million user mark in July of this year and estimates have the current membership at 550 million.

Does that mean the site will reach 600 million in the summer of 2011? Cast your vote in our poll and after you do, you’ll be able to see how others voted. And by all means, please share your rationale with us in the comments section.