[eluser]WanWizard[/eluser]
The backend is nearly finished (my guesstimation is in a couple of weeks). We're currently testing and tuning the workflow engine which the backend uses p.e. for the user registration and activation workflow.
It is build on top of CI, so you can use everything you're used to, but has quite a few CI extensions.
It also doesn't use the standard CI routing and one-to-one URL-controller mapping, but has an extremely modular approach to everything. All functionality is provided using installable modules. It supports multiple websites, you use the database to build you site folder structure. It uses a template engine with uses Joomla style templates. Modules export template elements (or widgets if you will), which can be placed in sections defined in the theme template (again, Joomla style). You can define site templates with layout elements that have to be applied to multiple pages (p.e. menu's, side panel elements, etc). Very flexible.
We use the Smarty template engine internally (lots of our customers have a requirement for developer/designer separation), but it support standard CI views as well.
It also has a task based RBAC system, supporting any combination of users, groups and roles. It also supports group and role nesting, so you could create a "SuperAdmin" role, and under that roles for the different admin tasks. A user assigned the SuperAdmin role will inherit all rights assigned to the underlying roles.
Have a look at our project website (see link in my signature). You'll find a link there to a v8 demo site that you can login to and look around, and access to our SVN source repository in case you want to look at the source.
