I would think there'd be FoV hacks/fixes for it like people made up for games when the Triplehead2Go was at it's prime. Did you take a gander at widescreengamingforums.com to see if the stuff people made worked with the eyefinity setup?
I'm thinking that once a solution is applied to a game, it should be uniform across ultra-widescreen standards as you're just trying to play nice with a resolution change.