where did u copy your bindingservice-plugin.jar file?
Actually I got the same problem but with JBoss3.2.2_RC1_tomcat4.1.24 I got it working.
Did u achieve any success with 3.2.1 as I am also working for the same version?
OK figured it out - its the example bindings.xml file - its incorrect!
then the port does correctly get mapped.
The bindingservice-plugin.jar is placed into the /server//lib folder along with all the other jars.
Any chance that the examples could form part of the JUnit tests? Without examples its next to impossible to learn the ins and outs of JBoss and without working examples it just makes it harder.