You are using IE.. this site doesn't render as its intended to look properly in that browser, and I only tested to make sure it works with Firefox (<3) and Chrome (gaar) ....basically IE doesn't have support for the fancy css styling I use for the top of the site background, to work around that would require a totally different approach and one I just can't be bothered doing because its far better the way I've done it.
Do Microsoft a favor and let them know they need to improve there browser, by not using it.
And even though you see empty space there, it has to somewhat accommodate for people who view the site with a smaller screen.
I also I wouldn't bother with ads, this site does in no way attract the number to make money off showing advertisement banners, that no one will click on anyway.