Oh tight. I hadn't even noticed the feature, because I just use the app to check in and out. Would love to have more first-class 'desktop' web support, since once I'm sitting there already using my laptop I don't want to have to keep whipping out my phone to do things.
But it's totally awesome to have the capability to check out who's there. I hope it goes a long way toward fostering a community there and helping people make useful contacts.