A few things.
First I dont like, and I am sure others wont like the image as a background. That is blurry, and although loaded fine on my fast connections, what are 56kers gonna think.
and the green is a bit glaring on the eyes. Go for a plainer look.
Other than that it is fine. I am sure others may also suggest you scrap the frames too. This is to avoid conflicts in older browsers. ;-)
Good luck, and I hope I was not too critical.