There is a handy Iphone app called "find my friends" avaliable for free on the ITunes APP store, using Google earth it allows another IPhone user to track or see your current location. Ive tried it while on a few runs out by asking my girlfriend to have a look a few times while im out, and then compared this the Garmin Connect Log from the run, and it is very accurate. Handy for those of us who run alone a lot or are out after dark or in the fells in dodgy conditions, could be a life saver if your not back when expected. Only people you want to, can find you too