Jonathan Seff, writing for MacWorld:
Thursday’s update improves the tools by adding a collaborator list to show who’s currently in a document; a collaborator cursor that displays cursors and selections for everyone in a document; the ability to jump to a collaborator’s cursor by clicking the person’s name in the collaborator list; and collaboration animation that displays images and shapes animate as others move them around.
Sounds like EtherPad. Can’t wait to give it a go.