Plugins - busy_ajax
Add to favoritesAll projects can benefit by having a simple ajax spinner that follows the mouse when ajax calls are being made by the browser in the background. Gives the user a better experience, and saves you from coding it into every "ajaxified" view.
http://github.com/ssoroka/busy_ajax/tree/master
git://github.com/ssoroka/busy_ajax.git
OpenSource
Misc. Enhancements

Moved this project to github: http://github.com/ssoroka/busy_ajax/tree/master
I just released a major update, it's largely re-written to be much less obtrusive. You no longer need to place a div in the body of the layout, it's added dynamically through javascript. all you need is to install the plugin and put javascriptincludetag 'busy_ajax' in the head of your layout. Sweet eh?