I have just released a few more modules. They are all in dev releases at the moment, and could probably use a little peer review. They are all live on School of Everything, but I have had to change a few things to make them generic. 

There is a detailed overview of the modules, and how they have been used at http://drupal.org/node/284675. (Thanks Giles)

I would love to get a little feedback from anyone attempting to use the setup on their own site.