Rail Spikes: Side projects and experiments: expanding the reach of page caching
http://railspikes.com/2008/9/29/an-experiment-with-page-caching

Caching paginated results

One of the many benefits of side projects is that you get to try out new things. In my job I can’t screw around too much—I’ve got a site to run. But with side projects, I can play with new APIs and try out ideas. Lately, Twistr has been my playground.