Even if the game does support the fov it doesn't mean you will actually see more. Some games reduce the amount you see in the vertical, not increase the amount you see in the horizontal plane (so you actually see less then you would do with a 4:3 monitor).
Great info Marc, thanks! My only question is, does it make it more difficult to play? The reason being you get kind of a "tunnel vision" view due to the fish eye adjusting to the screens. What I mean is, objects in the center are much further away since the FoV has been increased to compensate for the greater screen real estate. I notice this, especially in fast-paced games like BC2, as enemies are smaller than if I had left the FoV of default. Just looking for an experienced opinion.
Haven't played enough yet with the new FoV-setting to come to any conclusion.
Right now, I've set it at 22, which the calculator suggested, but I think it's to much. Originaly it's at 55 though. I'm probably going to end up somewhere in the middle...
Could you try using the iz3D driver on your Eyefinity setup?
As in, does Eyefinity also work with 3D? (AFAIK you can at least test the iz3D driver on non-120Hz/etc monitors, so it might indicate if it's possible to get a 3D effect, at least in red/blue mode).