For a while now we have seen Facebook gain on Google in terms of usage statistics, and more recently overtake it as well (in the US atleast). In late 2009, it was named the most popular content sharing site. Yes..Facebook..Not Digg, Reddit or StumbleUpon! FaceBook is having it’s annual developer conference – f8 on 21st April 2010. And as expected there seems to be plenty of action and speculation in...