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.
For the elements directlry under the <web-app> there is no specific order as per DD for servlet 2.4. But the sub-elements under the <web-app> elements, i think the order is still specific. As per the Servlet 2.3 the order is specific.