I've seen some press on Google's privacy policies in the past that indicated that they were capturing information about users without there knowledge, etc. Anyway, I wanted to post an email I received from them this morning that perhaps shows a different policy on user privacy. Thanks Google for letting me know I was "broadcasting". 
Hi,
To protect your privacy we would like you to know that Google Latitude is running on your mobile device and reporting your location.
If you didn't enable this or want to stop reporting your location, please open Latitude privacy settings or sign out of Latitude. To learn more, visit the Latitude Help Center.
Thanks,
Google Latitude Team
(c) 2010 Google Inc., 1600 Amphitheatre Parkway, Mountain View, CA 94043, USA. Terms of Service | Privacy Policy

Hi,
To protect your privacy we would like you to know that Google Latitude is running on your mobile device and reporting your location.
If you didn't enable this or want to stop reporting your location, please open Latitude privacy settings or sign out of Latitude. To learn more, visit the Latitude Help Center.
Thanks,
Google Latitude Team
(c) 2010 Google Inc., 1600 Amphitheatre Parkway, Mountain View, CA 94043, USA. Terms of Service | Privacy Policy