Fredrik has just released a new cut of PermissionManager
You can read his announcement here:
http://fredrik.nsquared2.com/viewpost.aspx?PostID=279
Fredrik is doing some awesome stuff with ASP.NET V2 and this project is a great example of that. If you want to learn about how - and possibly why - you would want to implement your own provider for a set of data access functionality such as this, then I highly recommend this code as a good example.
The code demonstrates how to create and initialize the provider, how to work with the configuration settings and how to interract with the proivider via a business manager object.