Letterbox: Get 3 columned Mail

Look how quickly a good idea takes off these days! Two days ago, a colleaque alerted me to a cool new hack for Mail that would give Mail a third column. He had followed the instructions at Hawk Wings and really liked the look. It was especially useful on his widescreen monitor, since it took advantage of the wider view. Then the next day, he said it had been turned into a plugin, and today I see the plugin has been renamed and given its own website! I’ve now modded my Mail, and certainly my 23″ monitor has plenty of room for the third column… giving me a much larger viewing area for my inbox list.

Version as tested: 0.16.