I highly doubt that facebook can be killed by building any open protocols, there are already protocols like foaf+ssl that could be used to build an open social

I highly doubt that facebook can be killed by building any open protocols, there are already protocols like foaf+ssl that could be used to build an open social networking, but that doesnt make it facebook killer. People use facebook because there are lots of other people using it and they don't care about openness as much as a geek do. Facebook would be killed only by time something even cool looking appear. And why do we want to kill facebook, anyway.