Amir Salihefendic talks about Redis, scaling plurk.com and some python libraries on top of redis like bitmapist.
Amix talks about scaling plurk.com with redis. The slides are available on Scribd.
If you don't have the time to watch the video you should at least check out the mentioned python libraries:
- redis_wrap is a wrapper for the python list, dict and set datastructures backed by redis.
- redis_graph is a simple graph data base implemented on top of redis.
- redis_queue implements a python queue with redis. See my blog post simple python queue with redis where I did the same.
- bitmapist an advanced analytics library on top of redis bitmaps
The last one is really interesting if you want to do some custom analytics of your web site. There is also bitter, a php port of the analytics library.