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.
If you turn on access logging (uncomment its entry in server.xml) you'll have a typical log that can be parsed with programs like webalizer. This has log entries for every hit, including the response code.