It's clear that session storage is a super-popular use case for the Redis NoSQL data store. I found another example this week by Armin Ronacher who writes about his coding excursions with the Flask Python micro framework.
Check out his code, described here, for the Redis session interface classes:
The following code implements a session backend using redis. It allows you to either pass in a redis client or will connect to the redis instance on localhost. All the keys are prefixed with a specified prefix which defaults to session:
-- Armin Ronacher