I'm all for this option; however, edit conflicts
would be difficult to
avoid on heavily edited pages. User authentication is another obvious
problem; my preferred solution can be discerned from my .sig and the
attachments to this message.
I think the suggestion is just for them to be able to send a comment
that would be stuck on the comments page - another user would then at
some stage integrate that into the page text. You see this happening
already sometimes, people drop by, say they don't know how to work
wikipedia, but ... is wrong with the following page.
Steve