According to Google Mobile blog,
If you’ve enabled Location History for Google Latitude, you’ve been able to visualize interesting trends in your location history with a personal dashboard at google.com/latitude on your computer. Now, you can also see your dashboard on your phone by tapping View location history from your Latitude profile. You’ll be able to see right on your phone how far you’ve travelled as well as an estimate of how much time you’ve spent at home, at work, or out.You can now start checking in at “home” in Latitude:
1. Check in from Latitude and tap “Home - Tap to set your location” at the bottom of the nearby places list if you don’t have one yet.
2. Use the estimated current address or enter in your home address yourself.
3. Once you’ve checked in at home once, “Home” will appear at the top of the list when you’re checking in near there.
Now, you can add your own aspects for each place. So if you think a place has a beautiful view or great music, you can add it yourself and quickly share it with the world.
To get started, update Google Maps from Android Market on devices with Android OS 1.6+ anywhere Google Maps and Latitude are already available.