Yep! We're going to try it out in a few interested communities, and if people like it, we'll make it available GitHub-wide. It's early, though, and we want a chance to learn what works and iterate on a smaller scale before introducing it to everyone.

Is there any way to apply for the beta? I'm maitaining few communities that could really use this feature!

Quibbling over the details is a given, but people are going to like it. It fulfils such a clear need.

I haven't seen any official announcements, and this was the only repo I found that had it enabled. Hopefully it rolls out to a wider audience soon!