I agree that the more I can implement in Flex, the better user experience. What I'm brainstorming is that my business rules are implemented on the server side using java. This includes, but not limited, to things like validation. Then, come up with a way to "generate" the business rules from java into action script and/or MXML.
That would indeed be ideal.but far from trivial to design/implement. I certainly would be interested in hearing more on how you intend to approach this.