What Happened to Appear.in?

I few years back, I was on a remote development team. We used appear.in to almost every meeting. No registration needed - we just created a channel AD-HOC. Now I'm on a new team working remote, and the domain appear.in can't be found in the form it was. It's seems to be something completely different now, and no easy conference tool for me :/ Anyone knows the back-story about this?