In JBoss IDE, you can create a packaging to export your code to a .war file. See packaging section in project and create new WAR package.
Also, you can use the Tomcat plugin from Sysdeo. There you have the Tomcat properties with possibility to export project to a .war file (that is not Tomcat specific).
I hope it helps,
Sorry, I misunderstood your question. As far as I can see, there is still no JSP compilation property in RC1...
Maybe in RC2 ?