Google Latitude(service that lets you and your friends share your locations with each other) is now available for iPhone and iPod touch as a web application running in Safari.
In this app:
You can see your friends location on a map and modify your privacy settings so that you control how your location is shared and with whom.
You will also have basic search, directions functionality to help you get around the world said Google mobile blog.
Google also announced 2009 Online Marketing Challenge winners. Please see here.
Related: How to do everything with Google Latitude in gmail?