I'm picking this apart myself too. If we're lucky we can find a way to make it so that this can be a plug-in for the map without altering the existing functionality (and thus not have Quib be bugged by it.
)
In the meantime, we should be able to get the overlay to recenter with OnHoverIn and OnHoverOut, it just won't move directly with the MapPage. (Or would it be vice versa?)