is the portfolio section going to be a long page where you keep scrolling to see the content you add? You have like Photography and Graphics - will these be 2 seperate section where the user can click in to and see like a small preview of the image and if they want to see more of the image large scale wise they click on it and displays in a popup.
Just a thought - i like the background of the website though - looks cool. Maybe add some social networking icons and link them up and stick it in the header of your website or even create a footer and put it there.
Have a contact us form and some sort of captcha to avoid getting spammed. At the moment anyone can email you - why not have the email address private from the offset.