Another first from google.Now you can track your friends / relatives through their mobiles or wireless devices using google Latitude.

Google released the real-time location tool Google Latitude and opened up a new world of location-based services (LBS) for both PC and mobile phone users.Latitude enables you to track friends, family, employees and so on — and vice-versa — in real time.

Google Latitude is available on the following mobile devices wherever Google Maps for mobile v3.0 and above is supported:

– Android-powered devices with Maps v3.0 and above. G1 users in the US will be receiving Maps v3.0 in a system update soon.
– Most color BlackBerry devices
– Most Windows Mobile 5.0 and above devices. Note: Some Windows Mobile devices don’t support cell-ID location detection.
– Most Symbian S60 devices

Coming soon! (Not supported now)
– iPhone and iPod touch devices with the Google Mobile App (in the US)
– Many Sony Ericsson devices

Google Latitude allows you to share your location with friends and view their locations on a map.

Latitude is completely opt-in, so you must enable it before you can start sharing location and can disable it at any time.

With Latitude, you can also:

– Share your location and status updates with the friends you choose
– See on a map where your friends are and what they’re up to
– Quickly contact them with text message, instant message, or phone call
– Control how much or how little location info you want to share with whomever you choose.

You can start using it right now  by Clicking here.