Do it like Google! Define any number of occasions in your BE with a fancy AJAX-Interface and the plugin will display them in time... just like Google.
If you want to change logos on certain occasions (e.g. Christmas, Halloween) just like Google does, this plugin is what you need!
Create attention-grabbing animation ads that knocks on your visitor's screen and shows them your most important message ...in 5 seconds!
Lets commenters add a drawing or doodle on a picture from a given post.