Airchat is a new social media app that encourages users to “just talk.” A previous version of Airchat was released last year, but the team — led by AngelList founder Naval Ravikant and former Tinder product exec Brian Norgard — rebuilt the app and relaunched it on iOS and Android yesterday. Currently invite-only, Airchat is already ranked #27 in social networking on Apple’s App Store. Visually, Airchat should feel pretty familiar and intuitive, with the ability to follow other users, scroll thro...