The core of Facebook’s value is its ownership of identity of every person online. To that end, while a drone plane may have been unimaginable in 2004, it fits: the only thing lacking when it comes to Facebook’s role as the Internet phone book are the missing entries for the 4 billion people who are not yet online.

Ben Thompson on the world’s phonebook.

The opening is also an interesting (and brief) read about where Facebook comes from and why.