First and foremost, the site I'm going to be refering to is:

While the layout is nowhere near finished, I'm having trouble with one area of code. The Lorum Ipsum area is where the vast majority of content is going to go. Now, I want the box it's in to adjust it's height according to the viewer's browser height, so that it'll fit no matter what resolution you're looking at it in (while at the same time setting a minimum height as well so it doesn't get too small). At the same time, I need it to have an overflow scroll bar. This is where I run into trouble.

It seems the css wants a solid height limit, rather then an adjustable one, in order for the overflow command to work. Is there a way around this, or am I more or less stuck with one or the other?

Also, any design tips/comments/critiques are always welcome.