From Zeroasterisk

The simplest way to search this site is to use the search input on the left of the screen, below the navigation section and above the toolbox section. If you enter the title of an article and hit "go", it goes to the page, but if you enter a search term, and hit "Search" it searches the wiki for your text.

The only problem with this, is that this search doesn't also search the other sections of this site (photos, portfolio, etc.) and thus isn't a complete site search... If you need that functionality, you can use a site search at google. Here is an example search:

Google site search: nova site:zeroasterisk.com