Blazeds can easily be installed in jboss since blazeds itself is available
as a war file.
At begining of this year I had to use AMF to exchange data between a JSR168 portlet and a Flex developed UI.
Since Portlet Architecture didn't seemed to fit with BlazeDS architecture I grabed the blaze jars and used them form inside my portlet webapplication.
It worked like a charm. ( for AMF serialization purpouses)
This example helped me in doing so
(examples are in java 1.5 but it also works with Java 1.4 if you make the code to not use generics)