There's a standard for web sites that some designers adhere to:
Keep your page a maximum of 760 pixels in width.
This is a good rule, but by no means is this written in stone. As technology becomes cheaper, people's screen resolutions will increase. I remember when we were told to stick to 640 pixels as a standard.
Also, don't have distracting blinking ads or text on your pages. Try to stick to clam, fluid motion and try to stay away from sharply contrasting colours unless you're trying to make some part of the screen stick out.
What's making your page too wide on
http://www.theopu.com is the line with two 468x60 ad banners.
I think you should put one ad banner on that line and one ad banner lower on the page.
Otherwise,
http://www.theopu.com has a very clean look.
http://www.theplayerunion.com has the same problem with the two 468x60 ad banners. I would consider moving one down on the page or just getting rid of it.
Also, there are too many distracting ads on the left side on this screen. Consider a slowly scrolling sponsors module which dims those bright ads at about 160x300 pixels. You can use the marquee tag to do this.
Just my 2?
- Sid