Click the link at the top of the thread. There's an ARG going on right now where these electronic mites are being transmitted to Guardians. How you get them happens in different ways, but they give you a boost to your reputation and experience gains. We aren't yet sure if they're dangerous or not, but they have caused one civilian casualty (not a death though, at least not yet). We aren't entirely sure where they came from, either. Some say SIVA, some say Rasputin, some say Charlemagne (the Warmind, not me), and some even think Osiris has a hand in it. It's clear that the Clovis Bray institute had something to do with it, though, but they seem to be long gone.