Yesterday, AdAge ran a story that Facebook was preparing to roll out its first true location-based service (beyond its for-fun Presence thing ). The story said that the social network was partnering with McDonald's for a special Facebook app that would allow people to check-in to restaurants and get deals. But apps that use location to emulate Foursquare on Facebook have limited appeal. Much more interesting is what Facebook itself is planning to do with location. AdAge offered a little bit about that in their story, but didn't go too deep. Today, they have a new story that, to be honest, seems more like a recap of yesterday's, but with less of a focus on McDonald's. According to their sources, Facebook will start allowing users to update their status messages with their location as soon as late May -- yes, a few weeks away. What's still not clear from all of this is if this location ability will be more like Foursquare or more like Twitter? What I mean by that is, Foursquare is predicated around the idea of checking-in to a specific venue (as are Gowalla, Loopt, and others). Twitter, meanwhile, allows you to tag a tweet with your location -- not really a check-in. To me, this Facebook location system sounds more like the latter.