Flex 4 for Flex 3 developers

Flex 4 offers a whole new approach to development. What do those of us who already know how to build apps in Flex 3 need to know to start being productive?  Did you know that Flex 4 offers a new component architecture?  Do you know about the new states paradigm?  How about how to use things like a ViewStack or DataGrid (both of which don’t have Flex 4 versions) in your Flex 4 application.

Come on by and learn all this and more.