I really like this layout. The added whitespace and clear focus on the content (by having a different background color for the sidebar) is very effective.

I think I'd put a bit more space between the Name+Picture+#ofVotes and the content - perhaps half the space you have between paragraphs? I'm not much of a web designer, though.

One important factor is that there's no Quora branding - I'm sure that would be a prerequisite before they would consider the layout.