Google Latitude Orkut Application
Google have created a Google Latitude application for the social networking site orkut. The Google Latitude application lets orkut members share their location and see their friends' locations on a Google Map inside of orkut.
If members use Google Latitude from a mobile phone, they can even send updates about their location to their friends on orkut while they are out and about.
Via: orkut Blog: Google Latitude on orkut- share your live location with friends