As suggested, you can center the site through dreamweaver, and maybe use a (darkà grey background, that always looks nice with white.

I also got a lot of blank spaces. There's also something wrong with your bullets or it doesn't look as good as it could. Maybe you can just put the bullet in front of e.g. cPanel/Fantastico and so on.

Another advise, it's better not to use so many shadows/reflection. Or at least that's my experience.

Hope you can do something with it.