Heres a test of the WVGA -120 setting on the new GoPro2
Footage is slowed to 24fps. My only complaint is that this mode is non-HD, and thus makes it a task to incorporate it into an HD timeline without either resizing it and loosing detail, or keeping it at 848x480 with a large black border. Regardless, 120fps is really great for capturing fast motion on an rc airplane.
View this video on YouTube