I was able to find a solution on another message board using the jquery javascript file. Heres the link if it is helpful to anyone else. http://stackoverflow.com/questions/9195814/google-maps-v3-keyboard-accessibility/9218055#9218055 This solution enables a user to tab down to the map and immediately access keyboard functionality. The problem now is setting up the map so that markers can be selected using a keyboard. I don't know if that is even possible and it seems like a difficult undertaking.
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