Are there any IDE's which will help me debug JSPs?
A really cool feature is that you can enable VAJ to work with the freely available JSP 1.1 reference implementation Tomcat, available from the Apache Group. In fact, you can also use the freely available VAJ Entry Level Edition (which is limited to using 750 classes - more than sufficient for getting started) to debug JSPs which run under Tomcat. Read the excellent article published in the Visual Age Developers Domain titled "Apache Tomcat Servlet and JavaServer Pages Development with VisualAge for Java" by Sheldon Wosnick for the inside scoop.
Oracle recently announced JDeveloper 3.0, which features wizards to aid in JSP development and debugging.