Development Facebook : checks in, adding location-based feature

Facebook CEO Mark Zuckerberg | AP Photo/Tony Avelar
AP Technology Writer

NEW YORK (AP) -- Facebook users carrying their smart phones will soon be able to "check in" to real-world locations such as bars, parks and live concerts as the social network makes its first foray into the location services craze.

"Where are you?" is joining "What's on your mind?" as Facebook lets its users declare their whereabouts to their friends and people nearby.

With the much-anticipated launch of Facebook Places late Wednesday, the world's largest social network joins a growing number of services that let users find coupons, earn quirky merit badges or simply share with friends where they are.

These location services from various startups, including Foursquare and Gowalla, have grow in popularity with the widespread availability of smart phones that have GPS and other means of determining the user's location.

Facebook's version initially works through the site's iPhone application; users will need to download a free update of the Facebook app. Owners of other touch-screen gadgets can get the feature through visiting on their mobile Web browser. Facebook says it will add Places to other smart phone apps later.

As with any new Facebook product, privacy issues figure front and center into Places, but this time the company appears to have erred on the side of caution.

"Following the flaps created by earlier launches, Facebook seems to be taking a more moderate approach to location sharing," said Jules Polonetsky, a former AOL executive who now co-chairs the Washington-based Future of Privacy Forum. "Just about everybody recognizes location as something that you want to be in control of."

By nature, check-ins are "opt in" - that is, you won't be forced to check in to a location if you don't want to. When you do, your check-ins will be shared with your friends by default, but not the broader public unless you decide to do so.

If you're out and about with friends, you'll be able to "tag" them using the (at) symbol, much the same way you can already tag them in your status updates. Your friend will then be notified that you have tagged them and can choose to check in too, or reject it.

A feature called "Here Now" lets anyone who has checked in to a place see who else has done the same. Other Facebook users who have checked in to the same location will be able to see you even if they are not your friends, but you can turn this feature off.
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