Site design in itself looks very clean, colors blend well, content is presented well.
I personally would get rid of the top margin, which would eliminate the space at the top. As bradybnmci said, I think there's a little to much "open space" when viewing the site.
Possible make the template a little wider? Like I said, it looks good, and I don't want to take away from that, just some suggetsions. To me it has more of a "blog" feel as opposed to a business layout.