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Oh man, Gizmodo brings us the link to one project that I have to build! Not only is it functional, but damn it just looks incredible!
You are really just taking a directional antenna and slapping on a WRT router to do the negotiation for you, but still a wonderful idea. I haven’t honestly paid attention to see if they are using the router to repeat the wifi to a local ESSID or just using the network plugs, but either one is completely doable.