I am sure there are on this forums dynamic websites lovers. You can create such website using also Flex.

What is Flex ? Well, as official Flex websites states :
Flex is a framework that helps you build dynamic, interactive rich Internet applications. Flex applications are delivered on the web via the Flash Player or to the desktop via Adobe AIR.
You can download Flex from here or you can see some example of Flex works here.

I am quite sure that you will be impressed.