Been trying Google+ recently (Latitude tech is part of the whole), but it's not very accurate. Had my phone next to my wife's in the car, each of ours had its own position accurately, but the other lagged behind. Her phone showed me about 5 minutes behind, but mine said she was still at home, despite us having left together 50 minutes ago.
I don't know whether there's something up with her phone (but on her phone, GPS/Google maps had her position accurately, so not that) or whether there are some settings that only allow other people to view recent-ish, rather than minute-by-minute positions.
Endomondo sounds good, but I don't fancy having it on all the time (guessing it's drainy on the battery?). Is there anything else that allows someone to ping you for info? Presumably that's what "where's my 'droid?" does?
Find my phone is a very simple way to do it
I'll try this. Cheers!