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.
Also try looking at the DTD for the examples with Tomcat, sometimes seeing an actual web.xml with real values. Currently I am reading the Exam Cram book on the SCWCD exam, and they kind of describe the tags, but I feel they are a little inadequate for someone just learning. I mean I have already passed the SCWCD a while ago, and I was even a little confused. I think the Servlet/JSP specs have a little more description too. Good Luck. Mark