How to make the whole site a wiki

I have two options for sites which Wiki Pro would be a good fit but I can't figure how to set it up.

1. Have one wiki within a site (not multiple)

The example would be having site.com with site.com/wiki and then adding new pages to that. Currently it has to be site.com/wiki/somename/page - can "somename" be removed altogether?

This is what I am trying to achieve on my site "sunnah.us"

2. Having a whole site be a wiki... like Wikipedia

This would be if I wanted to make a somewiki.com with the whole thing being a wiki - similar to Wikipedia.