Accessibility.
While Ozbonography is a photography site, for various reasons I still believe that the site should be as accessible as possible. Too many people think 'accessible' means 'still giving information even if someone can't see the site' - but that's not the case.
I've set this site up so that it can be used and viewed by as many people as possible - whether they're on IE, Firefox, Netscape, Safari; Windows, OS X, Linux; Mac, PC, whatever
So it's been created by Ozbon designs with that in mind. And while the WAI and W3C rules aren't everything, making sure that the site validates as much as possible with them is always a good starting place.
As such, this site contains valid XHTML and CSS, and should comply with Level 1 Accessibility, according to the WAI.