Lee Brimelow created a Zend Amf tutorial
October 30th, 2008
Most of my examples have been produced in Flex and assume that you understand that Zend Framework. Lee produced a new tutorial that starts from scratch that and uses a netconnection out of Flash for the rather than RemoteObject from Flex. If your just learning Zend Amf go check out this video.
New video tutorial on using ZendAMF
Lee is not using comments.. 
Doc Bloc is your friend! LOL
Good tutorial