Nullpo Dig Challenge
http://harddrop.com (A Tetris Community)
My current personal best at Dig Challenge mode, 431 lines sent in 4:25 at ~98APM.
Hope you like it, this game is called NullpoMino and it's being developed by some devoted fans of the Tetris community. The game is free to download at: http://code.google.com/p/nullpomino/
Thanks for watching my videos =)