There are many modules that provide some sort of slideshow / rotator functionality.
If you aren't yet using Puppet or Chef for managing your *nix infrastructure, you should seriously consider it. The benefits are enormous. Frankly, I don't think you __can__ manage a modern infrastructure without using Puppet, Chef, or reinventing a configuration management framework with your own custom scripts. However, you can't use both Chef and Puppet together, so which should you choose?
Comparison of projects - The protocols of these projects are generally open and free. The software of the projects is generally free and open source.
