[lysol]

Until there are cross-network trusts, people will stay on the social network their social circle is on. They can be horrible, slow, riddled with privacy concerns, but if your entire family and entire circle of friends is on there you're going to feel a great deal of social pressure to participate.

[bhavin]

I completely agree, but on the other hand, facebook was at one point of time far behind myspace. one of the reasons it became a huge success is that the myspace had even bigger issues with privacy etc when facebook was considered nice and trustworthy. And its only after facebook became clear market leader, the user backlash started/became frequent.