In late 2007 Flickr was strongly considering creating a marketplace where users could buy and sell photographs hosted on the service. It was to be called Flickr Stock. Then-employee Sarah Cooper worked on the project and describes (Update: it has now been removed) it as “The concept of Flickr...

Chances are you use at least two major social networks – 49 million people, for example, visited both MySpace and Facebook in October 2008 (Comscore, worldwide). Nearly 7 million people in the UK use both Bebo and Facebook. A lot of people maintain very different friend lists on LinkedIn than...