You still need to put the page in a category, so it can be found without
knowing the URL before hand.
It's a bit weird how to get it there... hit edit on the page and select a
"book". If you wish to select a subcategory (which is strongly suggested to
not pollute the highest level), you need to select the parent cat and then
hit that change book button. Then a new drop down appears to select a parent
item. See I warned you it would be crazy! :)
You might want to repeat this song and dance for all the wiki pages you've
done as needed.