Unless you have been hidden under a large rock recently, you will know that Facebook has just launched its username URL tool which enables you to get a personal URL free, instead of using the exceptionally long ones which were automatically generated. Vanity took over me and I got my own but I got pipped to the post by another Chris Norton - so my Facebook URL is now: http://www.facebook.com/chrisnorton2  With the launch of this new service, thousands flocked to Facebook to make sure they secured their very own URL over the weekend. In fact, Robin Goad of Hitwise is reporting that web traffic hit record levels and Facebook was the second most visited ...