But, in the comments to that article, Antonio Vieiro and Dominique De Vito pointed to their 'need' for such games being made available (Antonio because he'd like to play space invaders, Dominique because he envisions a game platform on the NetBeans Platform). Speaking of game platforms, take a look at JMonkeyEngine. But a more generic platform for games for the desktop would be very cool.
So Allan sent me the plugins for the games he's been working on. They're not finished nor polished, since he only made them to test and demonstrate Javeleon. None the less, they're nice:
Need to upload them to the NetBeans Plugin Portal soon! And we need lots of games such as this (tetris, chess, etc), which would then be distributed as a single application platform for other Java-based games to be be bundled together as a unit.