One two criticism, using such a light wood (relative to the main area) will tend to draw people eyes to the borders. I guess along with that on my monitor each wood column end up being a three inch wide margin (8 inches of total space around the area that can hold content if you include the black padding), I know how it renders will vary quite a bit on monitor size but 2/5 of screen real estate in this case can never hold content. Granted most text posts this would be affect little, but when full size screen shots are posted it would cause extra scrolling that would have otherwise been unnecessary.
