Christophe Coenraets, the Macromedia Flex Evangelist, has
a cool little entry that not only shows a Flex Blog RSS/RDF Reader,
but it also shows the entire code used to build the application.
This is the most revealing information I've seen to do date on
how Flex operates and the types of applications you can build with
Be sure to check out his follow
up post—in which he posts the external CSS and XML files he used.