I did.Just reposting this because I think you missed it:
Latitude is part of maps, so you click the drop down in the upper left and select latitude, this should bring you to a screen showing which friends you share with or want to share with. To see the location you turn on latitude layer on maps.
You need GPS on. Best location is with both it and wifi on and it pings every few minutes, it'll show you how old the location is