Sun's Courses free

well, not all are free,but there are several free and interesting, like this:

"topics about Application Server PE 9: ease of development for Java Platform Enterprise Edition (Java EE) 5, installation and basic administration, service oriented architecture (SOA) features, deployment, performance, developer experience, security, debugging and troubleshooting features."

These courses bring mp3 explanations, and they look very interesting...

more info:
SUN's course
Sun training