Me and a bunch of friends on another board tried it out one night whatever week it launched a few months back. With supposedly something like 4-5k people online at the time, I ran into my friends at least twice each.
Unspeakable seems a bit over the top. I mean, it was chaos for sure. Porn on loop, guys exposing themselves and other things along that line, but I mean, it was pretty much what I expected. I think 90% of the people were on it for the show, and the rest were 4channers just trying to get a laugh. Oh yeah, and the penises.
One group of teenage girls saw me and typed "Dad?", I nearly cried and never went back.