This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
Since Resin is a Java app, it should be possible to run it with JPDA enabled. Then you can connect to it with an external debugger. Don't know about the NB debugger, but I've used JSwat (available from SourceForge) to debug webapps running in Tomcat that way.