NullpoMino is an open-source falling block puzzle game written in Java for Windows, Linux and Mac OS X. It also has online capabilities, letting you play single-player or multi-player games on a server. You can get it at the project page at http://nullpomino.googlecode.com Head to the netplay server's homepage for current room and player lists and for detailed statistics about the most active players. It's also got release announcements and other miscellaneous Nullpo-related news items. And be sure to thank xlro for running the server and for everything else he does!