English Wikisource has a few of these sorts of "featured" components, though it would seem that how we tag these items is different from others. Anyway, we are not on the list that was provided.
Do you see that these "badge features" will ever be usable for displaying a copyright notice? For example, putting the notice on WD, and then having it appear on a work, or on an author.
On a side note, I find it, umm, interesting that so many wikis have these components tucked away in monobook/vector rather than common.js, seems that they are only showing things to certain skins.