1. There are too many hover styles. Links are black to green, black to orange, black bold to blue, green to blue. Boxes turn darker on the left (very nice graphic btw), lighter on the right, and underlined in the center col.

2. Unnecessary whitespace at the bottom of the center col.

3. I'd keep "custom design" and "cms" in the graphic; it will look better.

4. The "info" box is a matter of taste. To me, it's gimmicky -- I'd prefer just to see the info displayed.

5. I haven't looked at the possibility of resizing a center column based on left column content in over a year. When I last tried, I decided it was impossible. If I was to try to do it today, my first thought would be javascript, since the first hurdle is reading the rendered height of a column. Server side, afaik you would have to create some sort of proxy for column height, like counting characters and tags, then multiplying the values by line height, but it would be a mess and would inevitably fail in some cases.