jsFiddle
<div id="wrapper" class="container-fluid">
<div class="row-fluid">
<div class="span12">
<div class="span2 sidebar">sidebar</div>
<div class="span10 content">content</div>
</div>
</div>
</div>
I've been searching Google for the past few hours trying to find a solution. I don't think I can do Faux Columns because the site is built on Bootstrap, so the sidebar width will change depending on the width of the browser.