I'm thinking headsets like [url=http://i.kinja-img.com/gawker-media/image/upload/s--jEbwXin2--/c_fit,fl_progressive,q_80,w_320/18mrpicet94k9jpg.jpg]dot hack[/url]. I can't speak for SAO but dot hack's are fairly sleek and work with cell phones, PCs, laptops and consoles so they work if you want the keyboard or say, a controller. I figure it would also be accessible by other the other platforms which may be why the game has a new wave of people who just signed up?