The idea for the plugin was from a Feature Request. Many sites require having to make a menu or certain position in your template scroll as the visitor scrolls. If you have such a need, this is a slick solution for you.
Note that this is a Joomla plugin and available for Joomla 2.5 and Joomla 3.2 currently.
Optional setting to disable in Mobile Devices and now for Tablets too.