I've been running Tomcat and Jboss standalone since January. I'm using the latest version of Tomcat and Jboss 2.4.4 it all works without a flaw.
Try downloading this: http://prdownloads.sourceforge.net/jboss/JBoss-2.4.8.zip
NOTE!!! You must ensure that you specify the JNDI parameters correctly in order to have your servlets, JSP pages etc. access JBoss services.
Best of luck!