GoPro HD has 2 setting actually. 480p and 720p have wider effective focal lenght whereas 1080p is (relatively) narrower. I don't have the numbers though.
Ok I found it:
Code:
1080p: 1920x1080 True HD featuring a 127º angle of view, 30 fps, and 16:9 widescreen aspect ratio
960p: 1280x960 Ultra Wide and Tall HD featuring a 170º angle of view, 30 fps, and 4:3 aspect ratio. See more of the action above and below than widescreen16:9 resolutions can show.
720p: 1280x720 Ultra Wide HD featuring a 170º angle of view, both 30 and 60 fps, and 16:9 widescreen aspect ratio