You will find only a paucity of help online.
Everyone is an expert on the theory, it seems, and mum on the practice. The closest I have seen is why I love SI and that is brother Greg's Principles book. Although, and I say it with love, the book does not have what you are looking for. I know because it was not what I sought either.
There is no functioning website or forum or anytning online that I know of.
We host a fellowship in our home and have for almost one year. Next week or two will be a year, I think. We didnt mark the date. A year in and we are only still starting to scratch the surface. God is speaking to us, though and we are hard after Him.
At the same time, my little family still attends a Sunday organized/institutional church. We go and we go home, and that is about it. My daughter enjoys their kids church and there is a benefit there for her. So, we are content to keep a "pinky toe" in that water. It is not our church family, we are barely acknowledged, but it is a friendly down home sort of snubbing so we are just fine with it. They are sweet enough.
But, our home fellowship? Another whole different story. Love and submission to one another grows. Yieldedness and earnest desire for one another to be strong in Christ grows. We are agreed, after a word of prophecy given and that we tested Scripturally this last Saturday night, to be in one accord of prayer for a certain matter (to do with God's leading and working in us) and so we are walking in that.
I am finding that maybe why no one has a message board on it is because where people are thriving or growing in this at all, message boards are inadequate or unwanted. I don't know. I just know I have very recently asked for the same resources you are seeking and also found none.
EDIT: Nix that anniversary mention. It was September. Told you we didn't mark the date. But, turns out we did sort of. I found the thread where I shared here about the changes we made in our garage. We started meeting on September 6, 2014.