Last month, Twitch continued its transformation into a fully fledged social network with a feature called "Friends." And now the streaming service is opening it up to users, albeit in limited beta form. The list, which can have up to 500 people per account, will let you see who's online and, if need be, send private messages (aka Whispers) with a single click. Right now, Twitch says it has activated accounts for anyone who signed up at PAX East in April, as well as a few other members of the community.