Have you ever wanted to force your users off your app if they go idle for a certain period of time? Many online banking sites use this technique. If your app is used on any kind of public computer system, this type of functionality is essential for maintaining the privacy of your data.
The plugin is dead simple to install and configure. To get started:
script/plugin install git://github.com/pelargir/auto-session-timeout.git
Then hit the README for step-by-step instructions.