For the first time in roughly a year, I saw what my sie looked like in IE6, and I was distraught. Not a single page renders the way it should, with some practically unusable. With IE8 on the horizon, is it worth it to remake my CSS to work with IE6?

As of right now, we're talking about roughly a third of our visitors are IE6, a third are IE7, and a third are Firefox. However, the IE6 statistic is decreasing by the month. While 30% is a rather significant audience to cut off, I'm just wondering whether you spend the extra time and effort to design for older versions of IE?