The 2.0 PTR is live, as well as the closed beta for reaper of souls. I'm pretty sure the playerbase is shared between both so even if you're not lucky enough to get an invite, you can still hang out and chat and play non expansion content with everyone. I'm downloading the client data still, but logged in and looking around and trying to figure out communities and clans. So far there's ones for sites like reddit and GAF, but nothing for here. Would enough people here be interested in testing it out? Not sure if it'll carry over to live but could be worth looking into if enough are interested.
Edit: Looks like you can join one clan and then join any number of communities. Made a Giant Bomb community and a clan. PM me or post here if you want an invite.