Tedium has been released and you can find it on its own site at http://www.tediumapp.com/. Tedium allows you to configure a number of Time Machine backup destinations and when combined with ControlPlane, switch them automatically. To use ControlPlane with Tedium you will also need to install the latest version of ControlPlane which is as simple is choosing the Check for Updates menu option.
This project is in need of a new maintainer. If you are interested in this let me know via twitter @dustinrue