These days facebook has come to dominate the way people interact with the internet. Almost 26 million people logon to Facebook to chat with other people. As a result, a number of business people have also started migrating to Facebook, and have left LinkedIn as a result.
Here is a great insight on the unofficial facebook blog
Facebook users to differentiate between social contacts and professional contacts and separate your profile based on that. I fully support this motion but I doubt Facebook will do this anytime soon. If they did, it would officially be the end of LinkedIn. There is also another slightly uncomfortable aspect of this new influx of users that Megan touches on in her article. As the older crowd meshes with the younger crowd, new definitions of social interaction are rapidly being defined.