Linkedin as the Login of Choice

In ReadwriteWeb:  Short article and infographic about the rise of Linkedin as the Login of choice.    Facebook, though also moving toward more of a  B2B identity place,  is still used by many as a family and friend place.  Linkedin makes sense as a business identity, but they are still restrictive, for example making it too difficult to extract links, so as to keep you within their site.  Some of that manipulation is not appreciated, especially by bloggers who want to use shared links easily.