You can create links to pages by putting the page name in double parenthesis.
Another way is to use CapitalizedWordsJammedTogether.
Currently, the ability to create links automatically from these words is turned off because it puts question marks in strange places in the text. If you use a WikiWord that refers to a page that already exists, it will show up as a link.
You can always add a page by typing it's name in at the top of each page.
Another way to create a link is to use square brackets.
For more information about the Wiki Syntax visit the WikiSyntax page, linked on top of every Wiki page.