OK, so please bear with me for a second. What the heck are these check-ins about? foursquare? Huh, I can't make any sense of their horrid front page, what is this about? Where is the explanation (no, not a video, thank you I <i>can read</i>)? Allow me to play the grumpy ol' man here, but this look like another useless toy for teens. And yes, I include facebook and twitter in this category, too.