Something is still missing in the world of mobiles and social networks.
I strongly believe in the power of social networks in development, be they online or offline. They create communities of practice from the local to the global level, which promotes better understanding of what a best practice is versus what is just a good theory that doesn't reliably work. You also have amazing, unprecedented access through mobile phones and SMS.
But there's nothing solidly connecting the two (unless I'm missing something?)