Overview of security policy support?

[Jean-Sebastien Delfino]

There's quite a few moving parts now to support various security 
policies with Web Services. Some code in binding-ws-axis2, 
binding-ws-axis2-policy, policy-security-ws, policy-security and a 
number of samples and itests.

So far I've not been able to really grasp all this. Is there an overview 
of what each part does and/or how they relate to each other?

Thanks
--
Jean-Sebastien