Came to this article because I heard about DashCon, which apparently was going to be a TumblrCon and essentially failed horribly, awfully, all over the place. Various link-caches took me to this summation of what would be known as "TentMoot." It seems like a fascinating story that unfortunately isn't fully told on this page.
Further reading can be found here.
I am sharing this for my fellow LOTR fans, Meriadoc of course immediately jumps to mind.