The 48 hour game programming competition has just drawn to a close so you can all find my weekends work here: http://ludumdare.com/user/index.php?viewuser=318 (you may have to register, but I highly recommend you do, if only to check out the competitions entries).
CounterSheep should hopefully have everything included in the final zip, so just unzip to a dir and play. Theres at least one other entry that i spotted that was using Java (Java2D I think) but i’m not sure how completed it was.
As usually all comments are greatly appreciated