As we discussed earlier this week, Foursquare is a popular location-based social networking site (See Foursquare - So everyone can know where you are ALL THE TIME). By "popular," I meant: "I can't believe this start-up got more 100,000 users," NOT: "They're about to put Facebook, which has almost twice as many users as the United States has legal residents, out of business." Actually, Foursquare has less than 1% of the number of users that Facebook has, according to most of the reports I've seen, but Facebook had to jump in on the action, anyway. Thus: Facebook Places.
Actually, it's mostly only available to iPhone users at the moment, but the idea is that if you want everyone to know where you are (and see if you have any friends nearby), you can go on touch.facebook.com, and click "check in," then follow the instructions. You'll also have the ability to tag any peeps who might already be traveling with you.
The good news about this is that (for now, at least), this is an opt-in feature. Does this mean that Facebook learned a lesson from it's open graph fiasco? Or that it simply didn't want to make a bunch of people mad right before its movie hits theaters? We'll probably never know for sure, but for now, if you don't want to participate in Facebook places, you don't have to do anything. Maybe.
Also see: A Field Guide for using Facebook Places (Mashable)
Jennifer Pointer (e-mail) is in Tulsa, OK. She promotes a simple, a low-tech approach to effective online profile management, search engine optimization and social networking.