even though your account is only 5 hours old, and has only posted on this thread, i'm going to give you the benefit of the doubt.

some uses for redis, as we use it:

* pubsub (publish/subscribe) - push information through to other servers on channels

* job queuing - redis supports lists, which can easily become job queues

* statistics - redis supports incrementing and decrementing keys very quickly and easily, allowing for real-time statistics gathering and reporting

hope that helps.