Workflow

I've been having a delightful time with a bunch of new modules. Some of them, however, have been less delightful than others. I'm not sure I understand the fundamentals of what I'm trying to do (I /thought/ it was straight forward)

I need to create a publishing environment.

(1) pages are created and edited by a content manager
(1b) when the editing is finished the content manager pushes their revision to their supervisor (all supervisors within a role is fine)
(2) pages reviewed and then published to the Web by a supervisor
(3) the supervisor may choose to send the page back to the content manger for further revisions (this triggers step #1)
(4) the content manager may choose to edit a new version of their page after it has been approved and published (this triggers step #2, but the approved page stays live while the new revision is waiting for approval)

I have installed and configured workflow, workflow_ng, actions, revision_moderation and diff. I've also read up on how workflow is supposed to work. I've read (or watched):
http://www.lullabot.com/videocast/drupal_actions_and_workflow_video
http://drupal.org/project/workflow_ng
http://drupal.org/node/175370

My set-up looks like this:
Revisions and diff
http://flickr.com/photos/emmajane/2617774024/
http://flickr.com/photos/emmajane/2617774170/
http://flickr.com/photos/emmajane/2616951323/

workflow tab
http://flickr.com/photos/emmajane/2617773930/
(shouldn't there be something there?!)

state machine
http://flickr.com/photos/emmajane/2617774334/

rule configurations
http://flickr.com/photos/emmajane/2617774244/

View active rule
http://flickr.com/photos/emmajane/2616951043/

All of these screen shots are taken as user/1 so the access control should be irrelevant. I have a feeling I'm missing things (especially under the Workflow tab). I haven't been able to get content to move from the "creation" state to the "waiting for approval" state. I've successfully generated emails from rules within workflow_ng. I'm not sure where to look next. Suggestions on what I may/not have correctly configured would be greatly appreciated!! Thanks! :)