This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
jamon allows you to monitor all your ejb's by adding a few lines to your ejb-jar.xml file. This means you don't have to change your code. In addition to performance it will keep track of any exceptions that are thrown.