I hope the Google+ Latitude replacement gets more functionality soon because it's not that robust right now and I don't really want to use it in its current state.
I'd love to be able to set more easily which circles can see where I am with varying degrees of accuracy. (Followers can see my country, Colleagues can see my district or if I'm at a Place like the Office, my Best Friends can see almost exactly where I am and my Family see nothing ☺)
Being able to set it by time would be cool too, so as to, for example, only share your location during business hours.
I know this isn't really about +Google Maps
anymore, but it's my wishlist