I\'ve successfully used the beautiful Susy grid system to create a responsive layout similiar to the one of WebDesignerWall.com:
What i failed to implement is a
position:fixed works like position:absolute so it isn't positioned in relation of its container. It simply floats into your document.
A quick fix would be something like this:
/* 30% of the document width*/
lorem ipsum dolor sit amet
/* the rest of the website goes here */
more lorem ipsum than ever before