I've updated my online book at http://chariotsolutions.com/geronimo/ for M4. It's not all there yet, but I'm making progress. :)
Topics updated to M4 - Introductory material & installation - Configuring database pools & JMS - Development/Deployment Overview - Web Apps, EJBs, EARs Not yet updated but few substantial changes: - J2EE Connectors Now out of date (needs major update to M4): - Security Aaron
