I want to settle on a GUI framework, and use AJAX, as simply as possible.
Assuming adequate skills in both JSF and Flex, but not too skilled at AJAX/javascript, and assuming Java ...
We're on the way to Flex and our first add-ons to the JSF stack are very promising. We don't have any development problems regarding speed of deployment. You may rething the using of Cairngorm architecture. Use JSF where the use of the Flash Player 9 is a problem. Else its a good time to even try a pure Flex client implementation, ...