This week's book giveaway is in the Other Open Source APIs forum. We're giving away four copies of Storm Applied and have Sean Allen, Peter Pathirana & Matthew Jankowski on-line! See this thread for details.
If you look at the Skeleton interface, you will see that it is deprecated as of Java 1.2. You can force them to be generated, but in general they are not needed. Similarly, the JDK 5 release notes indicate that stubbing is no longer needed.