Facebook has taken its promising Lexicon tool down from the site. Perhaps this happened when they pushed their new redesign. Lexicon, like Google Trends, provided limited yet interesting data on site-wide trends. You can read more about it here.
From the Lexicon site....
"Thank you for your interest in Lexicon. We are removing the Lexicon product from Facebook for the time being. We may bring components of Lexicon back in the future, but we are focusing development on our analytics tools for Page owners, advertisers and Platform developers."
Analytics remains a major focus at Facebook for advertisers and page owners. They recently pushed out a tool that lets page owners see detailed data about their individual items. Still, I would like to see the social network emulate Google more in how they share global data.