Some amazing stats from the Mediabistro AllFacebook Marketing Conference this morning, where Vincent Sider, VP of Social Media for the BBC’s commercial arm, BBC Worldwide, bemoaned the impact of Facebook’s new EdgeRank algorithms. For anyone who’s not run into this problem, Facebook recently tweaked its backend settings to prevent so much corporate content from reaching Fans’ News Feeds. As a consequence, some brands’ posts are now reportedly seen by as few as 6% of their Fans. Yep, just six percent. Pretty hard to get return on that investment.