Hi Monique,
I realize I'm late to this party but wanted to give my two cents just in case you're still interested in feedback. I've had the lucky (or unlucky, depending on the day) experience of being a webmaster for a large organization and have been studying usability for quite some time. I have found that whether the site is for artists or the site is for a Fortune 100 software company, certain principles will always apply.
I know I am always tweaking my own sites but I realize that most people aren't interested, either because the results they are getting are good enough or since they contract out their web development to others, every change means another $300 bucks or so.
Design: Overall, I agree with Alexandra. The simplicity, the elegance is very nice. In the photo I've attached, I made some changes I would have made to affect the usability of it. Hopefully you can see it; I had to scrunch the size of it.
First of all, as a web designer I never use black as a background color if I can help it. While in real life black is very elegant and is used often to set off the rich colors of a painting, electronically it reads too harshly (yes, I would include even this beloved forum in that assessment). If you want to use something elegant, go for a dark charcoal, #333333. See how the gray makes the green look a lot less pastel-ly? And for example on your Biography page, where there's lots of white text, that's just really hard to focus on for a long period of time, against a black background. I'm assuming you want people to read it.
Next, the font of your links in your global navigation. Use mixed case. Upper case is simply difficult to read. I would have "Home" as my first, left-most link. That's where people expect to see it. And I put more space inbetween each link. That improves how easily people will read the text.
Other than that, the content looks good and the functionality is fine.
Of course, your work is really nice!

Are you getting good results from the site? What are you using to track your traffic?