BrightKite is a new social-networking (snet) system that implements GPS/navigation information into yout tweet broadcasts (like Twitter). It can also forward these messages to trusted friends, friends (broad) or to everyone (universal). Its advised that you only show your close friends your exact location… incase that girl you met at the pub the other night with seven teeth and a brother called Doyle.
Its available as a web based service (not sure how location works with this) or for iPhone (maybe also for Blackberry?)
I predict this to be what Twitter should have been. Not a failwhale.