I, hypothetical tutorial writer, would like folks to be able to help me out by editing and directly contributing material to my tutorial themselves. Rather than only being able to append comments, which I then have to grovel over.

Or create a page of links on topic foo, which people can easily add to, flag as broken, and generally comment on.

Hmm... can one currently create multipage content?

Another need is apparently some perl projects are looking for a wiki infrastructure they can use.

So basically, a more free-form and "everyone can collaboratively edit the text" corner of Perlmonks.