Just heard about Liquid Threads . . . .
Ugh, history .. that one will definitely still need some debugging (and usability improvements). It's fairly complex to version the history of an entire tree, so it's a bit prone to bug. We'll try to have comment-level history as well.
Just thinking aloud here. What is the purpose of 'discussion' in this wiki? Is it the same as a threaded forum? (No) I observe huge variation in wikipedia, sometimes it is chronological of the discussions, othertimes it is annotated by points raised in a structured discussion - there is even moderation, reformatting of posts to preserve the sense.
Should anyone edit my posts? Are they actually "posts"? [Hmm, I will see if I can edit some one elses . . ]
Formatting. Do I like the absence of lines, boxes etc, this minimalist view? (I think yes)