Every WPMU admin has experienced the pain of having embed codes stripped out of their posts and pages.
The annoyance of users not being able to insert widgets into text boxes, of having to figure out all those darn shortcodes.
Well, consider that fixed… this plugin simply allows users to add additional tags (embed, iframe, etc) to be used when writing a post or page (in their html tab).
Or when using a text widget.
And it’s so simple you can add other elements to it at will yourself.