Just a personal opinion... Dzogchen is about mostly having a very qualified guru, study and practice.
I pay special attention to what Namdrol says about the subject since he has qualifications to speak about it. It's good to understand better a few points.
But Dzogchen practice has nothing to do with forums. Here and there we can learn bits and pieces, but actual practice is not something that can be easily put in words. And I'm not talking about fancy experiences or profound insights, but simply the whole process, what really goes on as we practice and time goes by.
It's easier to discuss sutrayana, even some aspects of tantra, but Dzogchen practice has something about it that really doesn't make me want to talk about it in public forums. It's like showing the picture of a delicious fruit and spending lots of time talking about it. Unless we bite, all falls short, all seems quite fake. I don't know if you guys get what I mean (since my English is not that good). This doesn't mean I don't like to read what others say, but the usual ping-pong of arguments when it comes to Dzogchen seems rather sterile.
Just my opinion, obviously, and let me stress it again, it's the opinion of an ignorant who probably thinks he is less ignorant than he really is.