So, I'm a newbie to all of this, but I'm just wondering if I can run JSP code on JBoss without creating a WAR file. In Tomcat, I think I remember being able to place the JSP files in the root directory or something. If not, can anyone point me in the direction of step-by-step "creating a WAR" guide? Thanks.
You can find a lot information about JSPs and servlets at http://pdf.moreservlets.com/. Check out chapter 4, Using and Deploying Web Applications.
But for serious WAR file building, look into Ant or Maven 2.