While we're guessing why fb did this, it certainly looks like something that govt bodies which might need to run such infrastructure can borrow. If fb is, for example, shooting for the "national id" programme as I read somewhere, who'd you expect a govt to pick? - a company whose infrastructure cannot be touched or certified for suitability and security or one whose arch is laid bare like so? Of course, the software is part of the architecture, but would the "open graph" suffice?<p>(ok, 'nuff wild speculation for the day!)