Brad Wilson and Ed Jezierski have posted good articles drilling down on specific changes on CAB.
This one is about WorkItemExtensions, a mechanism to extend WorkItems without changing the original code. Brad covers here three topics that you are very likely to use. I gave an introduction in my recent post, but these are much more detailed:
- More on public API changes and new attributes.
- Where is the old "ApplicationHost"? How this affects startup?
- The CabApplication<> and Family classes. Also on startup.
In the following days we will compile all this information in one place for better reference. Hope this helps in the meantime.