I was reading this thread today and saw this item about Google Latitude. I was not familiar with Google Latitude so I followed the link to learn more ... only the link didn't work.
A bit of searching later and I learn that Google had retired Latitude as of August 9, 2013. https://support.google.com/gmm/answer/3001634?hl=en
(at least today) is my source of information.
John / N8FYL