Toyota just announced plans to launch one for its customers, and while our initial reaction was an eye-roll and sighs of "what the world needs now," the truth is that it's really just a system that uses Twitter and Facebook to let you know when something's amiss. Dubbed Toyota Friend (and built on Salesforce.com's private Chatter network), the service will dish up battery power warnings to electric vehicle owners, along with maintenance tips -- advice that can pop up on phones, tablets, and "other advanced mobile devices." In addition to their friendly neighborhood car dealerships, folks can befriend other cars and the friends and family who own them, though it's unclear from the press release below why you'd care. (Okay, we suppose if we had a teenage driver we might want to know if they were about to break curfew.) If that all sounds like bunk, you probably won't get a test drive soon, anyway -- the service is slated to launch in 2012, in Japan, and, initially, for electric and hybrid vehicle owners only.