Four customized buttons have been added to the edit tool bar:
to warp text within {{CIT}};
to insert a timestamp template;
to insert a Filebox template;
and to add the uncredited image tag.
I just added those we use the most. I'm open to suggestions.
Update: per Tupka217, I've added buttons for
Character;
Episode;
Comic
Organization infoboxes.
Update: added:
to add a tag for episodic or comic references;
to add a tag for an Ask Greg answer.