Having some time lately, someone requested I upload my full Tetris solution, binary, installer and all. I finally did so and it is available here.

The installer in the TetrisSetup project comes with the XNA 3.1 runtime package, but not .NET 3.5 or Windows Installer 3.1 (I assume you have those already). In the Tetris project, I left the release source if you didn't want to recompile it yourself. I also included the aforementioned bass.dll.

Have fun!