Just completed the Google Latitude setup on Blackberry Curve. The process is very simple. I was already using Google Maps 2.0 and just had to download the latest version of the Google Maps and install it, which comes with built-in Google Latitude.
The Latitude is completely opt-in right now and you need to have a Google account and approval from both parties to see each other’s information. A public interface would be good if someone wants to share the location openly on blog etc.
Aleem's Weblog 
Man that’s cool.
Setting up Google Latitude .Thanks for nice post.I added to my twitter.