For me, there is a scroll bar on the bottom at 1024*768 for the front page. If I want to see the stuff on the right side of the page, I lose the stuff on the left side of the page and vice versa...
On this page, there is a scroll bar on the bottom at 800*600 (but the entire width is still readable...)
Depends which computer I'm using. Right now it's a 1280 x 800 laptop. At work I have a couple of 1600 x 1200 tubes. In either case my browser window is normally somewhere between 40-60% of the screen size. I am one of those with lots of varied sized windows all over the place, rarely maximize anything.