Tab slideshow plugin - Awesome for in-office dashboards!
This extension will cycle through any open tabs. It comes with an option page allowing you to specify how long each tab should be displayed and whether or not it should be reloaded.
Upon opening the options dialog it'll cycle through all the tabs to take a screenshot making it easier to see which tab you're configuring.
Keep in mind that this was an evening project and probably contain a lot of rough edges so don't blame me if something catches on fire.