The "Network" is a new feature that Ryan Kopf has been working on to help people keep in touch with him, and with the campaign. You can read about it »here«. It's got some excellent features that are being updated daily. People can send messages back and forth through the service, find other locals, and much more all for free.
Some of the features are still temporarily lacking, but it looks like they're being worked on. For example, searching isn't top quality yet. Adding friends is lacking too. But you can send messages with ease and even get email alerts when new things happen. We encourage you to try it out!