Mike Nimer says ColdFusion + the new Flex Builder (formerly Zorn) = WOW! So, what's new here? Basically, a new ColdFusion Adapter that uses the new AMF protocol that works with Actionscript 3.

The new adapter allows for standard data type support, ValueObjects (passing actual instances of Actionscript Classes that map directly to CFC instances and vice versa), and security roles via the CFLOGIN framework.