It's been nine months since I wrote the original Ultimate Guide to the Facebook Edgerank Algorithm. I was amazed to see the reaction to the piece. It clearly seemed to strike a chord as it went on to be the most popular guest post on Econsultancy in 2012. But a lot has changed since then in the world of Facebook. As I'm currently putting together a presentation for the upcoming Econsultancy Digital Shorts event in Manchester on Edgerank and other social algorithms, now seemed the perfect time to revisit the piece to update and expand it.