TONG is Tetris and Pong in the same place at the same time!
Latest is v1.2, available here: http://nongnu.org/tong/tong-wii.zip File size is 35M, most of which is music from the very talented Marcus Hirt and Jared Burke.
TONG for Wii is played with the Wii remote held sideways (NES-style). Manipulate the tetrads as usual with +, 1 and 2, tilt the controller to move the paddles.
All sources and assets are GPL3. Code and other versions available at: http://nongnu.org/tong/