Google_Latitude_mapToday, Google is introducing Google Latitude to give you the ability to see where your friends and family are on your smartphone or PC. It super imposes the location of the person on top of Google maps, and shows provides users with the ability to control whether they would like others to see their locations. Latitude locates users using using a combination of GPS, WiFi and cell tower.

For now, supported devices include all Android devices, most BlackBerry devices, WinMo 5.0 and up devices, Symbian S60 devices, with iPhone/iPod Touch and Sony Ericsson devices support coming soon.

If you are starting to worry about being tacked by your friends and family, don’t worry. First, Latitude gives you the ability to control whether you want others to see your location. Second, location-based social network/tracking is not new. Companies like Loopt and Whrrl have been doing this for years, but Google’s entry will help this become mainstream. We told you this year would be huge for location-based services, and our prediction is becoming true.

Our next prediction is that Facebook and MySpace will enter this space too. Already, many Facebook and MySpace users are using their mobile app to access the social networks, so it makes a lot of sense for them to add location-awareness to them. That will of course make tracking your buddies even more common.

Hit the video below to see the official Google Latitude video to see how it works.