Introductory article on BlazeDS - AMF server for Adobe Flex and Air

As an alternative to using REST or SOAP with your Flex / Air apps (which have the advantage of ease and familiarity, but the disadvantage of adding an extra layer of translation on client), you may want to consider Adobe's AMF (Action Message Format). Here's a good introduction to AMF: http://www.infoq.com/articles/blazeds-intro (From Kenbo )