I'm definitely in support of "mega-threading" anything related to the Reddit blackout unless it's big breaking news (but mega-thread those events too).
I've also started to look for communities for some of my interests, but I suspect it's going to take a while before a lot of them spread to here. There are also a bunch that I can't really start since I am primarily a consumer and not a producer (specialized topics like astrophysics that I am not a subject matter expert for).