Last month,
Java Report had an article on programming Java for the Palm. Instead of covering KVM, the author talked about the Waba VM (available for free from Wabasoft). It seems pretty cool. I'm going to download the Waba SDK and try it out.
Waba contains a subset of Java classes; excludes event listeners, exception handling (back to return codes), and threads; and you have to learn the Waba way of doing UI. Also, Waba maps your use of Java classes to their own implementations.
Has anyone worked with Waba?