I am sure that all of us at one time have developed a website with more
than one column. In the past (back in my tables days) columns and rows
were a huge part of my designs. Things are about to change. In the
midst of cross-browser support issues with CSS2, A List Apart has a wonderfully written article that dives into the specifics of the proposed addition to the CSS standard (CSS3).
Funny thing is this was proposed in draft from in 2001. I for one would
find this very useful and a much needed time saver when coding column
websites. Take a moment and read their article.
One last thing to note is the compatibility, according to ALA:
"The script has been tested in IE6, Firefox 1.0.4, Netscape
7.1, Safari 1.2 and 2.0, and Opera 8 (though the Opera tests indicate a
tendency to crash)."