download:
http://code.google.com/p/nullpomino <-original
http://t-xz0.tk/ <-skydrive, with some other tetris games available for download
requires java runtime environment: http://www.java.com
net server:
nullpo.it.cx <-international default server
nullpo.gicp.net (or npcn.tk) <-a server run in china
