Its really simple to create a scalable social network using Redis, to
demonstrate this I wrote a small library called "resn" in python that
can provide out of the box support for friends, news feed, asymmetric
connections (like Twitter) and authentication. It uses the redis-py
library by Andy McCurdy and Amir Salihefendic's redis_wrap.
This library can be used by app developers who need to create mini
social networks and can be found at
https://github.com/vivekn/resn/
Hope this helps,
Vivek Narayanan