This week's giveaway is in the EJB and other Java EE Technologies forum. We're giving away four copies of EJB 3 in Action and have Debu Panda, Reza Rahman, Ryan Cuprak, and Michael Remijan on-line! See this thread for details.
There is no more updated version of the code conventions. Although the statement "Revised April 20, 1999" is misleading - it has changed since then. But not recently - not for JDK 5 or 6. For the new features of JDK 5 I would simply follow the example of the code show in the JDK 5 release notes for new language features. For JDK 6 I don't think there are any new features which require new conventions. If you find a contradiction between the JDK 5 release notes and the code conventions, follow the conventions. But for any issue not addressed in the conventions (spacing around generics, enhanced for loops, and enums mostly) follow the release notes examples.