I decided to hook my monitors back up yesterday after work to test this issue with the FOV. You will view the same top & bottom on your center display, Eyefinity or not.
I think I thought I was adjusting my FOV in my BC2 setting.ini file but I'm pretty sure I was adjusting the setting in my backup setting.ini file in My Documents... This is my stupidity.
I think Eyefinity is great, but its just not for me though. I tried Eyefinity in BF after getting the FOV on my main display correctly, but I noticed the side monitors image was distorted and stretched. It's weird, you can look at one of the side screens, then turn to what you're seeing on your side screen with your main screen and the image looks completely different on your main screen compared to your side screen. Yeah, I could see more left & right with Eyefinity but the image on the side monitors for me was too distorted for it to really give an advantage.
I think the info below could be useful to anyone considering an Eyefinity setup in landscape. This info is from a discussion in the overclock.net Eyefinity club thread. These are all replies from the thread OP regarding my discussion about the distortion & stretching on the side screens.
Don't directly look at the side monitors. They are there for peripheral, not straight observation like the main one.
If you don't like that, you can go portrait mode eyefinity. It's gonna make games look like you're staring through a window into another reality instead of a monitor. It fixes the distorting issue, and portrait mode eyefinity is just awesome.
3x 16:10 will look less stretched than 3x 16:9, since 3x 16:10 sees less to the sides, and therefore less of the stretched part
The distortion is a side effect of modern FOV scaling, which works much the same way that real life optics do. Wide angle lenses distort the image on the sides just like eyefinity does, and just like even single 5:4 screens does. The lesser the FOV, the lesser the effect. This is why single screen quake looks more distorted than single screen BC2. There's more FOV in quake.
There's no reasonable method of getting rid of the distortion on modern methods, since it would take too much power to post process each image to not to scale as such.