It's still working well for me in Version 3.2.1 (112) ... in version 2.5.2 I think it also still works, but there's an OS change that can get you int a situation where it does not work. In particular WriteRoom 2.5 was built before OS X had built in fullscreen mode... and WriteRoom 2.5's typewriter scrolling requires that you enter WriteRoom's custom fullscreen mode to work. To do this:
- Exit full screen mode if already in fullscreen mode (click the green window button)
- Enter WriteRoom's custom fullscreen mode with Window > Enter Full Screen Mode
- Now (assuming settings are checked in preferences window) typewriter scrolling should work.