06/27/2011 11:22 am ET | Updated Aug 27, 2011

Numbered: The Week's Must-See Tech Stats

"Numbered," our weekly digits digest, is bringing you the numbers behind the news.

This feature highlights the top new stats, facts, and figures to bring you the latest on tech, by the numbers, and quantify the changing state of mobile, social media, and more.

In this week's edition: what a Facebook fan is worth, the iPad vs. its rivals, and more. See last week's stats here.