I'm still trying to wrap my head around the new Facebook Groups . It seems well-thought-out (yes, despite the sometimes annoying opt-out aspect) and well-implemented , but I'm just not sure what my use case for it is going to be. I want to use it, but I can't figure out a reason to just yet. Oh my god, it's Google Wave all over again! Okay, it's really not. Instead, it almost seems like what Wave should have been when Google launched it as a consumer-facing product. Groups may lack some of the snazzy HTML5 bells and whistles and realtime technology of Wave, but it more than makes up for those in user experience and user interface elements that make this thing downright usable by human standards -- something, sadly, Wave never quite achieved.