Well, one of the nice aspects of a Wiki is the automatic link generation. That's a pretty cool thing that would come in handy for documentation writing, although there may very well be better ways of implementing it.
As far as using Wiki's on OpenACS.org, that's a judgement by the site administrators and I have enough faith and respect in Ben and Don to accept their decisions.
However, that doesn't stop anyone from implementing a wiki and seeing if there is some utility in such a tool. There are some communities that get a great deal of work accomplished through them, so they must have some use. Implemented with strong version control (if that's possible) might solve the most obvious problem.
Still, I don't think this is such a big issue. I have a feeling we're going to be yelling at each other on bigger issues soon. And Don hasn't even gotten back yet, and we're going need all of our collective breathes to deal with that dude.
talli
