Some notes:

Flex Developer Center has a new tab for Flex Interface Guidelines whose purpose is to:
- Communicate intentions
- Set a standard for Flex application design
- Share RIA design expertise
- Solicit your RIA design expertise

Most of the slides come straight from the available content on the web site

Notable discussion:

Think about using motion to drive where focus should be instead of motion just for the sake of motion.  E.g. A list item is clicked and it becomes the new screeen.