More "Walled Gardens"
Read this article by by Rich Karpinski about the how "open" strategies from each of the major social networks are really an attempt to create a large walled garden - a la telcos. They are all creating gated communities!

In my mind, one of the key reasons we are so far behind the rest of the world in mobile technologies is the walled gardens the telcos have created. Governments have a great opportunity to ensure that social networks collaborate (at least at some level) and gain a real competitive advantage. After all, it is the user's identity and personal information and user's should have control on how service providers get access to it. Also, standard interfaces should allow portability of my information.

:-(