The week ending March 13, 2010 Facebook reaches Top Ranking in the US and became the most visited website for the week.  Last September of 2007 Google fell to No. 2 from MySpace which is another social networking site.

“The market share of visits to Facebook.com increased 185% last week as compared to the same week in 2009, while visits to Google.com increased 9% during the same time frame.” – Heather Dougherty

Full Story at HitWise Intelligence.