>Hi,
>
>Anyone delved into this library deeply enough to form an opinion ?:
>http://msdn.microsoft.com/en-us/library/cc707890.aspx

I don't know much about it, but, from what I understand, PRISM is the way to go now. I believe CAL, when compared to PRISM, is too complex and PRISM "simplifies" the process of building loosely coupled layers that are required for such applications. The concept and framework is something we are slowly investigating and there is a *lot* to learn about it. Just Google the PRISM framework and pattern to find out more.