Administrators can now grant immunity to underlying IP blocks to certain "trusted" editors. See this thread on WP:AN. The official policy statement is still getting firmed up.

As well as this, a new privilege called "Account creator" has now been added. This overrides the cap on daily account creations per editor. Currently, it's set to 6, but this allows certain editors to create unlimited accounts (as happens on WP:ACC, for example).

There yiz go! (IMG:smilys0b23ax56/default/tongue.gif)