New MPOG idea

I was reading a tutorial on using PHP and GD with GIS data, that is how to draw maps with PHP using real life data. There has to be a cool way to make on online game out of this although I’m not sure what. I was thinking something along the lines of the old CashWars game… PHP, GD, GIS, maps, CashWars, MPOG, online games, multiplayer, MMORPG, MORPG