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.
Have you tried running the startup shell script directly? What have you done to debug the script? Have you redirected stdout for the various commands so that you can capture the output? Has anything shown up the JBoss logs? And I assume that you have manually started JBoss AS with the run.sh script and it works.