This is amazing ... go to http
://www.engadget.com/
Find the "Facebook Activity" social plugin in the right column:
This Facebook social plugin allows you to see your friends' activity that is related to the content of the page you are viewing!
It will also make real time updates .... so if you and I are both viewing the same Engadget page and I comment on one of the news items on Engadget in Facebook then my update will appear in realtime on YOUR version of the Engadget page (assuming we are friends on Facebook).
Try it out, let me know what you think. Should we consider including the "Facebook Activity" module on developerWorks?
Tags: 
social
facebook